Titanium BT5-1 Annealed vs BT5-1-ELI
Titanium · BT5-1 temper comparison
BT5-1 Annealed and BT5-1-ELI are two conditions of the same titanium grade, BT5-1: Annealed versus ELI. The chemistry is identical, so every difference below comes from the condition. BT5-1 Annealed is the stronger of the two: yield strength 800 MPa (116 ksi) against 720 MPa (104 ksi) for BT5-1-ELI, about 11% more; tensile strength follows at 860 MPa (125 ksi) vs 790 MPa (115 ksi). In exchange, BT5-1-ELI is the more ductile: elongation 16% versus 13% for BT5-1 Annealed, and BT5-1 Annealed is harder (300 HB vs 280 HB).
BT5-1 AnnealedChoose it when strength drives the design.
BT5-1-ELIChoose it when the part is bent, formed or impact-loaded.
BT5-1 Annealed vs BT5-1-ELI: 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 43 GPa6.2 Msi · Bulk Modulus 105 GPa15.2 Msi · Poisson's Ratio 0.31
Physical
Density and transition temperatures.
Same in both: Density 4.46 g/cm³0.16 lb/in³ · Melting Point (Solidus) 1,550°C2,822 °F · Liquidus Temperature 1,600°C2,912 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 9.4 µm/m·K5.2 µin/in·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Min Service Temperature -253°C-423 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 1.1 % IACS · Electrical Resistivity 1.57×10⁻⁶ Ω·m61.8 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 85 / 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 40 / 100 · Brazeability / Solderability 45 / 100 · Polishability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 650 MJ/kg279,450 BTU/lb · Embodied Carbon (primary production) 40 kg CO₂/kg · Embodied Water 500 L/kg59.9 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.
BT5-1 Annealed vs BT5-1-ELI — frequently asked
Is BT5-1 Annealed stronger than BT5-1-ELI?
Yes. BT5-1 Annealed has a typical yield strength of 800 MPa (116 ksi) against 720 MPa (104 ksi) for BT5-1-ELI — about 11% more. Tensile strength is 860 MPa (125 ksi) vs 790 MPa (115 ksi).
Which condition does FabDigit quote by default, Annealed or ELI?
Annealed is the default BT5-1 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, BT5-1 Annealed or BT5-1-ELI?
BT5-1-ELI. Its weldability rates very good (80/100) against very good (75/100) for BT5-1 Annealed.
Ready to make it?
Upload a CAD file and FabDigit prices the part in BT5-1 Annealed and BT5-1-ELI 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.