Titanium Ti-15-3-CRA vs Ti-15-3-O
Titanium · Ti-15-3 temper comparison
Ti-15-3-CRA and Ti-15-3-O are two conditions of the same titanium grade, Ti-15-3: CRA (cold worked and aged) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. Ti-15-3-CRA is the stronger of the two: yield strength 1,380 MPa (200 ksi) against 790 MPa (115 ksi) for Ti-15-3-O, about 75% more; tensile strength follows at 1,450 MPa (210 ksi) vs 820 MPa (119 ksi). In exchange, Ti-15-3-O is the more ductile: elongation 20% versus 4% for Ti-15-3-CRA, and Ti-15-3-CRA is harder (46 HRC vs 27 HRC). Ti-15-3-CRA is stiffer (105 GPa vs 82 GPa) and Ti-15-3-CRA runs hotter in service (315°C vs 260°C continuous).
Ti-15-3-CRAChoose it when strength drives the design, or when the part sees heat.
Ti-15-3-OChoose it when the part is bent, formed or impact-loaded.
Ti-15-3-CRA vs Ti-15-3-O: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Hardness, Rockwell C
Same in both: Shear Modulus 31 GPa4.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.31 · Reduction in Area 50% · Compressive Strength 810 MPa117 ksi · Shear Strength 540 MPa78.3 ksi · Hardness, Brinell 265 HB · Hardness, Vickers 280 HV
Physical
Density and transition temperatures.
Same in both: Density 4.76 g/cm³0.17 lb/in³ · Melting Point (Solidus) 1,600°C2,912 °F · Liquidus Temperature 1,650°C3,002 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 8.1 W/m·K4.7 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8.5 µm/m·K4.7 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 1.2 % IACS · Electrical Resistivity 1.4×10⁻⁶ Ω·m55.1 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 88 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 16% · Weldability 70 / 100 · Brazeability / Solderability 45 / 100 · Polishability 65 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 750 MJ/kg322,442 BTU/lb · Embodied Carbon (primary production) 48 kg CO₂/kg · Embodied Water 600 L/kg71.9 gal/lb · Typical Recycled Content 20%
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-15-3-CRA vs Ti-15-3-O — frequently asked
Is Ti-15-3-CRA stronger than Ti-15-3-O?
Yes. Ti-15-3-CRA has a typical yield strength of 1,380 MPa (200 ksi) against 790 MPa (115 ksi) for Ti-15-3-O — about 75% more. Tensile strength is 1,450 MPa (210 ksi) vs 820 MPa (119 ksi).
Which condition does FabDigit quote by default, CRA or O?
O is the default Ti-15-3 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 is easier to machine, Ti-15-3-CRA or Ti-15-3-O?
Ti-15-3-O. Its machinability rates poor (20/100) against not recommended (12/100) for Ti-15-3-CRA.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti-15-3-CRA and Ti-15-3-O 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.