Titanium Ti Grade 1 Annealed
Temper · default condition
UNS R50250 · EN 3.7025 · GB TA1
Default stocked condition: maximum ductility for forming, cladding and corrosion service.
Values for the Annealed condition
Other Ti Grade 1 tempers and conditions
Ti Grade 1 is listed in 7 conditions; see the grade overview at Ti Grade 1.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Recrystallization annealed | Pick for the most severe deep drawing, spinning or hydroforming where every point of elongation counts. | 190 | 295 | 38 | 110 HB | 3.1 % IACS |
AnnealedDefaultThis page mill annealed sheet, plate, bar and tube (ASTM B265/B348/B338 Grade 1) | Default stocked condition: maximum ductility for forming, cladding and corrosion service. | 225 | 310 | 32 | 120 HB | — |
Forged and annealed | Annealed forgings and flanges for corrosion-service valve/pump bodies. | 225 | 310 | 30 | 120 HB | 3.1 % IACS |
Hot rolled | Economical heavy plate and bar where the mill-scale surface and slightly higher strength are acceptable. | 250 | 340 | 27 | 128 HB | 3.1 % IACS |
Stress relieved | Use to remove forming/welding residual stress and improve dimensional stability while keeping most cold-work strength. | 320 | 400 | 20 | 150 HB | 3.1 % IACS |
Cold drawn | Choose for straight, close-tolerance small-diameter bar/wire with moderately raised strength. | 340 | 420 | 18 | 160 HB | 3 % IACS |
Cold rolled | Thin strip, foil and spring-like parts where cold-work strength and flatness matter more than ductility. | 400 | 480 | 10 | 180 HB | 3 % IACS |
What is Ti Grade 1 Annealed?
Ti Grade 1 Annealed is Ti Grade 1 in the Annealed temper — default stocked condition: maximum ductility for forming, cladding and corrosion service. Ti Grade 1 Annealed has a yield strength of 225 MPa (32.6 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 95% of titanium grades. Elongation at break is 32% and the elastic modulus is 103 GPa (14.9 Msi). Ti Grade 1 Annealed has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,665°C (3,029 °F).
Advantages
- Ductile — tolerates forming and impact — 32%, better than 98% of titanium grades
- Easy to machine — 42/100, better than 98% of titanium grades
- Forms and bends easily — 88/100, better than 94% of titanium grades
- High electrical conductivity — 3.1 % IACS, better than 75% of titanium grades
Limitations
- Low strength — 225 MPa (32.6 ksi), worse than 95% of titanium grades
Ti Grade 1 Annealed properties
Typical room-temperature values for Ti Grade 1 Annealed; 12 are specific to this condition. Other listed values are Ti Grade 1 reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Ti Grade 1 Annealed has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,665°C (3,029 °F).
Mechanical16
Ti Grade 1 Annealed has a yield strength of 225 MPa (32.6 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 95% of titanium grades. Elongation at break is 32% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
Ti Grade 1 Annealed is rated for continuous service to 300°C (572 °F). It conducts heat at 16.4 W/m·K (9.48 BTU/hr·ft·°F), better than 71% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Ti Grade 1 Annealed conducts electricity at 3.1 % IACS, better than 75% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (92/100), better than 53% of titanium grades.
Sustainability4
Producing a kilogram of Ti Grade 1 Annealed takes about 650 MJ of energy and emits 38 kg of CO₂ — less than 75% of titanium grades. Typical recycled content is 30%.
Manufacturability8
Ti Grade 1 Annealed's machinability is fair (42/100, better than 98% of titanium grades); weldability excellent (88/100); formability excellent (88/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ti Grade 1 Annealed
Is Ti Grade 1 easy to machine?
Slow speeds, heavy positive-rake sharp tools, high-pressure flood coolant and rigid setups; the soft low-oxygen matrix smears and work-hardens, so avoid dwelling and never let chips ignite in dry cuts.
Can Ti Grade 1 be welded?
Excellent by GTAW/GMAW/PAW/EB/resistance with ERTi-1 filler, but requires clean surfaces plus trailing-shield or chamber argon protection below ~430 °C to prevent oxygen/nitrogen pickup and weld embrittlement.
Can Ti Grade 1 be formed, bent or molded?
The best-forming titanium grade: cold deep drawing, spinning, roll forming and explosive/roll cladding are all practical, allow generous springback and use 1.5–2 t bend radii or warm forming at 200–300 °C for tight bends.
What surface finishes work on Ti Grade 1?
Pickle in HNO3/HF to remove alpha case and scale, then bead blast, polish, or anodize (colour interference or AMS 2488 hard anodize) to fight the alloy's natural galling tendency; paint adheres well after abrasion or anodizing.
Ti Grade 1 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| N | ≤ 0.03 | 0.01 |
| C | ≤ 0.08 | 0.02 |
| H | ≤ 0.02 | 0.01 |
| Fe | ≤ 0.2 | 0.08 |
| Omax; controls strength | ≤ 0.18 | 0.1 |
| Others (each)residual, each | ≤ 0.1 | — |
| Others (total)residual, total | ≤ 0.4 | — |
| Tibalance, ≈99.5 % | balance | — |
Ti Grade 1 Annealed — frequently asked
What is Ti Grade 1 Annealed used for?
Ti Grade 1 Annealed is typically used for chemical process equipment, deep-drawn sheet parts, medical implants (low-load), desalination components and architectural cladding. In short: most formable CP titanium; lowest-strength CP grade; best deep-drawing titanium sheet.
What is the yield strength of Ti Grade 1 Annealed?
Ti Grade 1 Annealed has a typical yield strength of 225 MPa (32.6 ksi) and a tensile strength of 310 MPa (45 ksi) — weaker than 95% of titanium grades. Strength varies by condition: see the 7 listed tempers.
Is Ti Grade 1 Annealed easy to machine?
Not especially — machinability is rated fair (42/100, better than 98% of titanium grades). Slow speeds, heavy positive-rake sharp tools, high-pressure flood coolant and rigid setups; the soft low-oxygen matrix smears and work-hardens, so avoid dwelling and never let chips ignite in dry cuts.
Can Ti Grade 1 Annealed be welded?
Yes — weldability is rated excellent (88/100). Excellent by GTAW/GMAW/PAW/EB/resistance with ERTi-1 filler, but requires clean surfaces plus trailing-shield or chamber argon protection below ~430 °C to prevent oxygen/nitrogen pickup and weld embrittlement.
What surface finishes work on Ti Grade 1 Annealed?
Pickle in HNO3/HF to remove alpha case and scale, then bead blast, polish, or anodize (colour interference or AMS 2488 hard anodize) to fight the alloy's natural galling tendency; paint adheres well after abrasion or anodizing.
Can Ti Grade 1 Annealed be formed, bent or molded?
The best-forming titanium grade: cold deep drawing, spinning, roll forming and explosive/roll cladding are all practical, allow generous springback and use 1.5–2 t bend radii or warm forming at 200–300 °C for tight bends.
What is the maximum service temperature of Ti Grade 1 Annealed?
Ti Grade 1 Annealed is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Ti Grade 1 Annealed and Ti Grade 1-CR?
Annealed is the default condition — default stocked condition: maximum ductility for forming, cladding and corrosion service. CR: thin strip, foil and spring-like parts where cold-work strength and flatness matter more than ductility. Yield strength is 225 MPa in Annealed versus 400 MPa in CR.
Sources
- ASTM B265 — Titanium and Titanium Alloy Strip, Sheet, and Plate — ASTM International (2020)
- ASTM B348 — Titanium and Titanium Alloy Bars and Billets — ASTM International (2021)
- ASTM B338 / B381 — Ti tube and forgings — ASTM International (2019)
- GB/T 3621 / GB/T 2965 — (TA1) — SAC (2022)
- ASM Handbook Vol.2 — Properties of Nonferrous Alloys (Titanium) — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- Commercially Pure Titanium Grade 1 technical data — titanium mill datasheets (TIMET/ATI-class) (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.