Titanium Grade 2 vs Ti Grade 4
Titanium · grade comparison
Titanium Grade 2 and Ti Grade 4 are both titanium grades. Ti Grade 4 is the stronger of the two: yield strength 520 MPa (75.4 ksi) against 380 MPa (55.1 ksi) for Grade 2, about 37% more; tensile strength follows at 620 MPa (89.9 ksi) vs 440 MPa (63.8 ksi). In exchange, Grade 2 is the more ductile: elongation 28% versus 20% for Ti Grade 4, and Ti Grade 4 is harder (250 HB vs 150 HB). On the shop floor, Grade 2 machines more easily (fair vs poor) and Ti Grade 4 sits in a lower cost tier (high, $$$$) than Grade 2 (specialty, $$$$$).
Grade 2Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
Ti Grade 4Choose it when strength drives the design, or when cost is the deciding factor.
Grade 2 vs Ti Grade 4: 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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Hardness, Rockwell C
Same in both: Shear Modulus 45 GPa6.5 Msi · Bulk Modulus 110 GPa16 Msi · Poisson's Ratio 0.34 · Fracture Toughness (K_IC) 70 MPa·√m63.7 ksi·√in
Physical
Density and transition temperatures.
Melting Point (Solidus)
Same in both: Density 4.51 g/cm³0.16 lb/in³ · Liquidus Temperature 1,670°C3,038 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Latent Heat of Fusion
Min Service Temperature
Same in both: Thermal Expansion (CTE, 20–100 °C) 8.6 µm/m·K4.8 µin/in·°F · Max Service Temperature (continuous) 300°C572 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 3.1 % IACS · Electrical Resistivity 5.6×10⁻⁷ Ω·m22 µΩ·in
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)
Castability
Brazeability / Solderability
Same in both: Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Energy (primary production) 650 MJ/kg279,450 BTU/lb
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Shock Resistance Index
Same in both: Thermal Diffusivity 7 mm²/s
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 | Grade 2 | Ti Grade 4 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | O | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | 1 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| AlCrN | Yes | — |
| AlTiN | Yes | — |
| Anodizing Type II | Yes | — |
| CVD Al2O3 | Yes | — |
| CVD TiCN | Yes | — |
| CVD TiN | Yes | — |
| Cerakote | Yes | — |
| CrN | Yes | — |
| DLC | Yes | — |
| Electropolishing | Yes | — |
| HVOF Coating | Yes | — |
| MoS2 | Yes | — |
| Multilayer CVD | Yes | — |
| TiAlN | Yes | — |
| TiB2 | Yes | — |
| TiCN | Yes | — |
| TiN | Yes | — |
| WC/C | Yes | — |
They share 1 finish: Plasma Spray.
Grade 2 vs Ti Grade 4 — frequently asked
Is Ti Grade 4 stronger than Grade 2?
Yes. Ti Grade 4 has a typical yield strength of 520 MPa (75.4 ksi) against 380 MPa (55.1 ksi) for Grade 2 — about 37% more. Tensile strength is 620 MPa (89.9 ksi) vs 440 MPa (63.8 ksi).
Which is cheaper, Grade 2 or Ti Grade 4?
Ti Grade 4 is the lower-cost material: it sits in the high tier ($$$$) while Grade 2 is specialty ($$$$$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, Grade 2 or Ti Grade 4?
Grade 2. Its machinability rates fair (40/100) against poor (30/100) for Ti Grade 4; for welding the order is Grade 2 first (excellent, 90/100) then Ti Grade 4 (excellent, 85/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Grade 2 and Ti Grade 4 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.