Titanium ERTi-1 vs ERTi-7
Titanium · grade comparison
Titanium ERTi-1 and ERTi-7 are both titanium grades. ERTi-7 is the stronger of the two: yield strength 330 MPa (47.9 ksi) against 210 MPa (30.5 ksi) for ERTi-1, about 57% more; tensile strength follows at 420 MPa (60.9 ksi) vs 300 MPa (43.5 ksi). In exchange, ERTi-1 is the more ductile: elongation 30% versus 24% for ERTi-7, and ERTi-7 is harder (155 HB vs 110 HB). ERTi-1 conducts heat better (20 W/m·K vs 16.4 W/m·K).
ERTi-1Choose it when the part is bent, formed or impact-loaded.
ERTi-7Choose it when strength drives the design.
ERTi-1 vs ERTi-7: 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.
Shear Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 103 GPa14.9 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34 · Fracture Toughness (K_IC) 80 MPa·√m72.8 ksi·√in
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.
Thermal Conductivity
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Same in both: 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
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
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 Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Same in both: Machinability 40 / 100 · Polishability 70 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 500 L/kg59.9 gal/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Same in both: Specific Stiffness (E / density) 22.8 MN·m/kg
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.
Manufacturing and finishing
| Capability | ERTi-1 | ERTi-7 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 1 finish: Plasma Spray.
ERTi-1 vs ERTi-7 — frequently asked
Is ERTi-7 stronger than ERTi-1?
Yes. ERTi-7 has a typical yield strength of 330 MPa (47.9 ksi) against 210 MPa (30.5 ksi) for ERTi-1 — about 57% more. Tensile strength is 420 MPa (60.9 ksi) vs 300 MPa (43.5 ksi).
Which is cheaper, ERTi-1 or ERTi-7?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose ERTi-1 over ERTi-7?
Pick ERTi-1 when the part is bent, formed or impact-loaded. Pick ERTi-7 when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ERTi-1 and ERTi-7 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.