Titanium Ti Grade 29-SR vs Ti Grade 29-STA
Titanium · Ti Grade 29 temper comparison
Ti Grade 29-SR and Ti Grade 29-STA are two conditions of the same titanium grade, Ti Grade 29: SR (stress relieved) versus STA (solution treated and aged). The chemistry is identical, so every difference below comes from the condition. Ti Grade 29-STA is the stronger of the two: yield strength 930 MPa (135 ksi) against 845 MPa (123 ksi) for Ti Grade 29-SR, about 10% more; tensile strength follows at 1,000 MPa (145 ksi) vs 910 MPa (132 ksi). In exchange, Ti Grade 29-SR is the more ductile: elongation 14% versus 11% for Ti Grade 29-STA, and Ti Grade 29-STA is harder (36 HRC vs 33 HRC).
Ti Grade 29-SRChoose it when the part is bent, formed or impact-loaded.
Ti Grade 29-STAChoose it when strength drives the design.
Ti Grade 29-SR vs Ti Grade 29-STA: 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
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: Elastic (Young's) Modulus 114 GPa16.5 Msi · Shear Modulus 44 GPa6.4 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34
Physical
Density and transition temperatures.
Same in both: Density 4.43 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,604°C2,919 °F · Liquidus Temperature 1,660°C3,020 °F
Thermal
How each material carries heat and how hot it can run.
Same in both: Thermal Conductivity 6.7 W/m·K3.9 BTU/hr·ft·°F · Specific Heat Capacity 526 J/kg·K0.13 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 8.7 µm/m·K4.8 µin/in·°F · Latent Heat of Fusion 290 J/g125 BTU/lb · Max Service Temperature (continuous) 315°C599 °F · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1 % IACS · Electrical Resistivity 1.71×10⁻⁶ Ω·m67.3 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 96 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Formability (cold)
Same in both: Weldability 80 / 100 · Castability 45 / 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) 45 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 29-SR vs Ti Grade 29-STA — frequently asked
Is Ti Grade 29-STA stronger than Ti Grade 29-SR?
Yes. Ti Grade 29-STA has a typical yield strength of 930 MPa (135 ksi) against 845 MPa (123 ksi) for Ti Grade 29-SR — about 10% more. Tensile strength is 1,000 MPa (145 ksi) vs 910 MPa (132 ksi).
Which condition does FabDigit quote by default, SR or STA?
Annealed is the default Ti Grade 29 condition in the FabDigit quote flow (neither SR nor STA). 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.
When should I choose Ti Grade 29-SR over Ti Grade 29-STA?
Pick Ti Grade 29-SR when the part is bent, formed or impact-loaded. Pick Ti Grade 29-STA when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Ti Grade 29-SR and Ti Grade 29-STA 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.