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Titanium Ti-5Al-5Sn-2Zr-2Mo vs Ti-8Al-1Mo-1V

Titanium · grade comparison

Titanium Ti-5Al-5Sn-2Zr-2Mo and Ti-8Al-1Mo-1V are both titanium grades. Both yield at about 950 MPa — strength does not separate them. Ti-8Al-1Mo-1V is the more ductile: elongation 15% versus 12% for Ti-5Al-5Sn-2Zr-2Mo. Ti-8Al-1Mo-1V is lighter (4.37 g/cm³ vs 4.55 g/cm³ for Ti-5Al-5Sn-2Zr-2Mo) and Ti-8Al-1Mo-1V is stiffer (124 GPa vs 117 GPa).

Ti-8Al-1Mo-1VChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.

Ti-5Al-5Sn-2Zr-2Mo vs Ti-8Al-1Mo-1V: properties

Ti-5Al-5Sn-2Zr-2MoTi-8Al-1Mo-1V

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

117 GPa17 Msi
124 GPa18 Msi

Shear Modulus

44 GPa6.4 Msi
46 GPa6.7 Msi

Bulk Modulus

110 GPa16 Msi
115 GPa16.7 Msi

Tensile Strength (Ultimate)

1,035 MPa150 ksi
1,000 MPa145 ksi

Elongation at Break

12%
15%

Reduction in Area

25%
30%

Fatigue Strength (Endurance Limit)

550 MPa79.8 ksi
540 MPa78.3 ksi

Fracture Toughness (K_IC)

50 MPa·√m45.5 ksi·√in
70 MPa·√m63.7 ksi·√in

Charpy V-Notch Impact (RT)

14 J10.3 ft·lbf
20 J14.8 ft·lbf

Hardness, Brinell

320 HB
315 HB

Hardness, Rockwell C

34 HRC
33 HRC

Hardness, Vickers

335 HV
330 HV

Same in both: Poisson's Ratio 0.32 · Yield Strength (0.2% offset) 950 MPa138 ksi · Compressive Strength 1,000 MPa145 ksi · Shear Strength 660 MPa95.7 ksi

Physical

Density and transition temperatures.

Density

4.55 g/cm³0.16 lb/in³
4.37 g/cm³0.16 lb/in³

Melting Point (Solidus)

1,600°C2,912 °F
1,540°C2,804 °F

Liquidus Temperature

1,660°C3,020 °F
1,650°C3,002 °F

Thermal

How each material carries heat and how hot it can run.

Thermal Conductivity

7.5 W/m·K4.3 BTU/hr·ft·°F
6.5 W/m·K3.8 BTU/hr·ft·°F

Specific Heat Capacity

530 J/kg·K0.13 BTU/lb·°F
500 J/kg·K0.12 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

9 µm/m·K5 µin/in·°F
8.5 µm/m·K4.7 µin/in·°F

Max Service Temperature (continuous)

480°C896 °F
450°C842 °F

Min Service Temperature

-196°C-321 °F
-100°C-148 °F

Same in both: Latent Heat of Fusion 365 J/g157 BTU/lb

Electrical

Conductivity and insulation.

Electrical Conductivity

1.1 % IACS
0.9 % IACS

Electrical Resistivity

1.6×10⁻⁶ Ω·m63 µΩ·in
1.99×10⁻⁶ Ω·m78.3 µΩ·in

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Corrosion Resistance

88 / 100
85 / 100

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 %)

18%
20%

Formability (cold)

22 / 100
30 / 100

Castability

35 / 100
—

Brazeability / Solderability

40 / 100
45 / 100

Polishability

60 / 100
70 / 100

Same in both: Machinability 18 / 100 · Weldability 55 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Carbon (primary production)

42 kg CO₂/kg
45 kg CO₂/kg

Embodied Water

1,200 L/kg144 gal/lb
500 L/kg59.9 gal/lb

Same in both: Embodied Energy (primary production) 700 MJ/kg300,946 BTU/lb · Typical Recycled Content 25%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

227 kN·m/kg
229 kN·m/kg

Specific Stiffness (E / density)

25.7 MN·m/kg
28.4 MN·m/kg

Modulus of Resilience

3,857 kJ/m³
3,639 kJ/m³

Thermal Diffusivity

3.1 mm²/s
3 mm²/s

Thermal Shock Resistance Index

7
6

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.

3005007001,0004.555.5Density (g/cm³)Yield strength (MPa) — log scaleTi-8Al-1Mo-1VTi-5Al-5Sn-2Zr-2Mo

Manufacturing and finishing

CapabilityTi-5Al-5Sn-2Zr-2MoTi-8Al-1Mo-1V
Default condition——
Relative cost$$$$ High$$$$ High
Min. machined wall——
Best machined surface——

Both take the same 1 finish: Plasma Spray.

Ti-5Al-5Sn-2Zr-2Mo vs Ti-8Al-1Mo-1V — frequently asked

What is the difference between Ti-5Al-5Sn-2Zr-2Mo and Ti-8Al-1Mo-1V?

Titanium Ti-5Al-5Sn-2Zr-2Mo and Ti-8Al-1Mo-1V are both titanium grades. Both yield at about 950 MPa — strength does not separate them. Ti-8Al-1Mo-1V is the more ductile: elongation 15% versus 12% for Ti-5Al-5Sn-2Zr-2Mo.

Which is cheaper, Ti-5Al-5Sn-2Zr-2Mo or Ti-8Al-1Mo-1V?

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 Ti-5Al-5Sn-2Zr-2Mo over Ti-8Al-1Mo-1V?

Pick Ti-8Al-1Mo-1V when the part is bent, formed or impact-loaded, or when weight is the constraint.

Ready to make it?

Upload a CAD file and FabDigit prices the part in Ti-5Al-5Sn-2Zr-2Mo and Ti-8Al-1Mo-1V 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.