Titanium Ti Grade 27 CW-SR vs Ti Grade 27-HR
Titanium · Ti Grade 27 temper comparison
Ti Grade 27 CW-SR and Ti Grade 27-HR are two conditions of the same titanium grade, Ti Grade 27: CW-SR (cold Worked + Stress Relieved) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. Ti Grade 27 CW-SR is the stronger of the two: yield strength 380 MPa (55.1 ksi) against 265 MPa (38.4 ksi) for Ti Grade 27-HR, about 43% more; tensile strength follows at 450 MPa (65.3 ksi) vs 360 MPa (52.2 ksi). In exchange, Ti Grade 27-HR is the more ductile: elongation 28% versus 16% for Ti Grade 27 CW-SR, and Ti Grade 27 CW-SR is harder (170 HB vs 130 HB). Ti Grade 27-HR runs hotter in service (300°C vs 250°C continuous).
Ti Grade 27 CW-SRChoose it when strength drives the design.
Ti Grade 27-HRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
Ti Grade 27 CW-SR vs Ti Grade 27-HR: 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 27 CW-SRTi Grade 27-HR
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
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 B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 103 GPa14.9 Msi · Shear Modulus 39 GPa5.7 Msi · Bulk Modulus 108 GPa15.7 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 4.51 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,660°C3,020 °F · Liquidus Temperature 1,670°C3,038 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 20.8 W/m·K12 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 295 J/g127 BTU/lb · Min Service Temperature -250°C-418 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Same in both: Electrical Conductivity 3.4 % IACS
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 25 / 100 · Brazeability / Solderability 40 / 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) 36 kg CO₂/kg · Embodied Water 800 L/kg95.9 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.
Ti Grade 27 CW-SR vs Ti Grade 27-HR — frequently asked
Is Ti Grade 27 CW-SR stronger than Ti Grade 27-HR?
Yes. Ti Grade 27 CW-SR has a typical yield strength of 380 MPa (55.1 ksi) against 265 MPa (38.4 ksi) for Ti Grade 27-HR — about 43% more. Tensile strength is 450 MPa (65.3 ksi) vs 360 MPa (52.2 ksi).
Which condition does FabDigit quote by default, CW-SR or HR?
Annealed is the default Ti Grade 27 condition in the FabDigit quote flow (neither CW-SR nor HR). 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 Grade 27 CW-SR or Ti Grade 27-HR?
Ti Grade 27 CW-SR, by a small margin. Both rate fair for machinability — 48/100 against 42/100 for Ti Grade 27-HR.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti Grade 27 CW-SR and Ti Grade 27-HR 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.