Titanium Ti Grade 18 Annealed vs Ti Grade 18 CWSR
Titanium · Ti Grade 18 temper comparison
Ti Grade 18 Annealed and Ti Grade 18 CWSR are two conditions of the same titanium grade, Ti Grade 18: Annealed versus CWSR (cold worked and stress relieved). The chemistry is identical, so every difference below comes from the condition. Ti Grade 18 CWSR is the stronger of the two: yield strength 790 MPa (115 ksi) against 570 MPa (82.7 ksi) for Ti Grade 18 Annealed, about 39% more; tensile strength follows at 900 MPa (131 ksi) vs 690 MPa (100 ksi). In exchange, Ti Grade 18 Annealed is the more ductile: elongation 20% versus 12% for Ti Grade 18 CWSR, and Ti Grade 18 CWSR is harder (300 HB vs 240 HB). On the shop floor, Ti Grade 18 Annealed welds better (80 vs 70 out of 100).
Ti Grade 18 AnnealedChoose it when the part is bent, formed or impact-loaded, or when it will be welded.
Ti Grade 18 CWSRChoose it when strength drives the design.
Ti Grade 18 Annealed vs Ti Grade 18 CWSR: 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 18 AnnealedTi Grade 18 CWSR
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 105 GPa15.2 Msi · Poisson's Ratio 0.32
Physical
Density and transition temperatures.
Same in both: Density 4.48 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,650°C3,002 °F · Liquidus Temperature 1,704°C3,099 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 7.6 W/m·K4.4 BTU/hr·ft·°F · Specific Heat Capacity 540 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.4 µm/m·K5.2 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.4 % IACS · Electrical Resistivity 1.26×10⁻⁶ Ω·m49.6 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Same in both: Castability 35 / 100 · Brazeability / Solderability 45 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 650 MJ/kg279,450 BTU/lb · Embodied Carbon (primary production) 42 kg CO₂/kg · Embodied Water 320 L/kg38.3 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 18 Annealed vs Ti Grade 18 CWSR — frequently asked
Is Ti Grade 18 CWSR stronger than Ti Grade 18 Annealed?
Yes. Ti Grade 18 CWSR has a typical yield strength of 790 MPa (115 ksi) against 570 MPa (82.7 ksi) for Ti Grade 18 Annealed — about 39% more. Tensile strength is 900 MPa (131 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, Annealed or CWSR?
Annealed is the default Ti Grade 18 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 18 Annealed or Ti Grade 18 CWSR?
Ti Grade 18 Annealed. Its weldability rates very good (80/100) against very good (70/100) for Ti Grade 18 CWSR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti Grade 18 Annealed and Ti Grade 18 CWSR 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.