Titanium Grade 9-CW vs Grade 9-O
Titanium · Grade 9 temper comparison
Grade 9-CW and Grade 9-O are two conditions of the same titanium grade, Grade 9: CW (cold worked) versus O (annealed). The chemistry is identical, so every difference below comes from the condition. Grade 9-CW is the stronger of the two: yield strength 850 MPa (123 ksi) against 570 MPa (82.7 ksi) for Grade 9-O, about 49% more; tensile strength follows at 950 MPa (138 ksi) vs 690 MPa (100 ksi). In exchange, Grade 9-O is the more ductile: elongation 20% versus 10% for Grade 9-CW, and Grade 9-CW is harder (320 HB vs 250 HB). Grade 9-O runs hotter in service (300°C vs 200°C continuous). On the shop floor, Grade 9-O welds better (80 vs 70 out of 100).
Grade 9-CWChoose it when strength drives the design.
Grade 9-OChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Grade 9-CW vs Grade 9-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
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 107 GPa15.5 Msi · Poisson's Ratio 0.3
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 544 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.2 µm/m·K5.1 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Min Service Temperature -250°C-418 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 90 / 100
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 30 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 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 350 L/kg41.9 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.
Grade 9-CW vs Grade 9-O — frequently asked
Is Grade 9-CW stronger than Grade 9-O?
Yes. Grade 9-CW has a typical yield strength of 850 MPa (123 ksi) against 570 MPa (82.7 ksi) for Grade 9-O — about 49% more. Tensile strength is 950 MPa (138 ksi) vs 690 MPa (100 ksi).
Which condition does FabDigit quote by default, CW or O?
O is the default Grade 9 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, Grade 9-CW or Grade 9-O?
Grade 9-O. Its weldability rates very good (80/100) against very good (70/100) for Grade 9-CW.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Grade 9-CW and Grade 9-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.