Titanium Grade 27-ANN vs Grade 27-CW
Titanium · Grade 27 temper comparison
Grade 27-ANN and Grade 27-CW are two conditions of the same titanium grade, Grade 27: ANN (annealed) versus CW (cold worked). The chemistry is identical, so every difference below comes from the condition. Grade 27-CW is the stronger of the two: yield strength 450 MPa (65.3 ksi) against 230 MPa (33.4 ksi) for Grade 27-ANN, about 96% more; tensile strength follows at 520 MPa (75.4 ksi) vs 330 MPa (47.9 ksi). In exchange, Grade 27-ANN is the more ductile: elongation 32% versus 14% for Grade 27-CW, and Grade 27-CW is harder (190 HB vs 120 HB).
Grade 27-ANNChoose it when the part is bent, formed or impact-loaded.
Grade 27-CWChoose it when strength drives the design.
Grade 27-ANN vs Grade 27-CW: 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 103 GPa14.9 Msi · Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34 · Compressive Strength 250 MPa36.3 ksi · Shear Strength 240 MPa34.8 ksi · Fracture Toughness (K_IC) 85 MPa·√m77.4 ksi·√in · Charpy V-Notch Impact (RT) 90 J66.4 ft·lbf
Physical
Density and transition temperatures.
Same in both: Density 4.51 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,665°C3,029 °F · Liquidus Temperature 1,670°C3,038 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 16.4 W/m·K9.5 BTU/hr·ft·°F · Specific Heat Capacity 523 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8.6 µm/m·K4.8 µin/in·°F · Latent Heat of Fusion 365 J/g157 BTU/lb · Max Service Temperature (continuous) 315°C599 °F · Min Service Temperature -250°C-418 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.1 % IACS · Electrical Resistivity 5.6×10⁻⁷ Ω·m22 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
Formability (cold)
Same in both: Machinability Rating (AISI 1212 = 100 %) 38% · Weldability 92 / 100 · Castability 30 / 100 · Brazeability / Solderability 45 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 680 MJ/kg292,348 BTU/lb · Embodied Carbon (primary production) 42 kg CO₂/kg · Embodied Water 550 L/kg65.9 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 27-ANN vs Grade 27-CW — frequently asked
Is Grade 27-CW stronger than Grade 27-ANN?
Yes. Grade 27-CW has a typical yield strength of 450 MPa (65.3 ksi) against 230 MPa (33.4 ksi) for Grade 27-ANN — about 96% more. Tensile strength is 520 MPa (75.4 ksi) vs 330 MPa (47.9 ksi).
Which condition does FabDigit quote by default, ANN or CW?
ANN is the default Grade 27 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, Grade 27-ANN or Grade 27-CW?
Grade 27-CW, by a small margin. Both rate fair for machinability — 45/100 against 40/100 for Grade 27-ANN.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Grade 27-ANN and Grade 27-CW 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.