Titanium Ti Grade 25 Annealed vs Ti Grade 25-STA
Titanium · Ti Grade 25 temper comparison
Ti Grade 25 Annealed and Ti Grade 25-STA are two conditions of the same titanium grade, Ti Grade 25: Annealed versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Ti Grade 25-STA is the stronger of the two: yield strength 1,010 MPa (146 ksi) against 880 MPa (128 ksi) for Ti Grade 25 Annealed, about 15% more; tensile strength follows at 1,100 MPa (160 ksi) vs 950 MPa (138 ksi). In exchange, Ti Grade 25 Annealed is the more ductile: elongation 14% versus 10% for Ti Grade 25-STA, and Ti Grade 25-STA is harder (365 HB vs 330 HB). Ti Grade 25 Annealed runs hotter in service (400°C vs 350°C continuous). On the shop floor, Ti Grade 25 Annealed welds better (good vs fair).
Ti Grade 25 AnnealedChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Ti Grade 25-STAChoose it when strength drives the design.
Ti Grade 25 Annealed vs Ti Grade 25-STA: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all titanium grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all titanium grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Ti Grade 25 AnnealedTi Grade 25-STA
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Brinell
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 113 GPa16.4 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34 · Compressive Strength 970 MPa141 ksi · Charpy V-Notch Impact (RT) 17 J12.5 ft·lbf · Hardness, Vickers 345 HV
Physical
Density and transition temperatures.
Same in both: Density 4.43 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,604°C2,919 °F · Liquidus Temperature 1,660°C3,020 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 6.7 W/m·K3.9 BTU/hr·ft·°F · Specific Heat Capacity 526 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8.7 µm/m·K4.8 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1 % IACS · Electrical Resistivity 1.7×10⁻⁶ Ω·m66.9 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.08 V · Corrosion Resistance 95 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Weldability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 22% · Castability 35 / 100 · Brazeability / Solderability 35 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 640 MJ/kg275,151 BTU/lb · Embodied Carbon (primary production) 35 kg CO₂/kg · Embodied Water 1,200 L/kg144 gal/lb · Typical Recycled Content 25%
Strength versus weight
Yield strength against density for every titanium grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Ti Grade 25 Annealed vs Ti Grade 25-STA — frequently asked
Is Ti Grade 25-STA stronger than Ti Grade 25 Annealed?
Yes. Ti Grade 25-STA has a typical yield strength of 1,010 MPa (146 ksi) against 880 MPa (128 ksi) for Ti Grade 25 Annealed — about 15% more. Tensile strength is 1,100 MPa (160 ksi) vs 950 MPa (138 ksi).
Which condition does FabDigit quote by default, Annealed or STA?
Annealed is the default Ti Grade 25 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which welds better, Ti Grade 25 Annealed or Ti Grade 25-STA?
Ti Grade 25 Annealed. Its weldability rates good (65/100) against fair (45/100) for Ti Grade 25-STA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti Grade 25 Annealed and Ti Grade 25-STA side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.