Titanium Grade 2 vs Ti Grade 18
Titanium · grade comparison
Titanium Grade 2 and Ti Grade 18 are both titanium grades. Ti Grade 18 is the stronger of the two: yield strength 570 MPa (82.7 ksi) against 380 MPa (55.1 ksi) for Grade 2, about 50% more; tensile strength follows at 690 MPa (100 ksi) vs 440 MPa (63.8 ksi). In exchange, Grade 2 is the more ductile: elongation 28% versus 20% for Ti Grade 18, and Ti Grade 18 is harder (240 HB vs 150 HB). Grade 2 conducts heat better (16.4 W/m·K vs 7.6 W/m·K). On the shop floor, Grade 2 machines more easily (fair vs poor), Grade 2 welds better (excellent vs very good), and Ti Grade 18 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 18Choose it when strength drives the design, or when cost is the deciding factor.
Grade 2 vs Ti Grade 18: 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
Bulk Modulus
Poisson's Ratio
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: Elastic (Young's) Modulus 103 GPa14.9 Msi · Fracture Toughness (K_IC) 70 MPa·√m63.7 ksi·√in
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 365 J/g157 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Galvanic Potential (seawater, vs SCE) -0.1 V · Corrosion Resistance 93 / 100
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
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Same in both: Embodied Energy (primary production) 650 MJ/kg279,450 BTU/lb · Typical Recycled Content 25%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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 18 |
|---|---|---|
| CNC machining | Yes | — |
| Sheet metal | Yes | — |
| Default condition | O | — |
| Relative cost | $$$$$ Specialty | $$$$ High |
| Min. machined wall | 1 mm | — |
| Best machined surface | Ra 1.6 µm | — |
| AlCrN | Yes | — |
| AlTiN | Yes | — |
| Anodizing Type II | Yes | — |
| CVD Al2O3 | Yes | — |
| CVD TiCN | Yes | — |
| CVD TiN | Yes | — |
| Cerakote | Yes | — |
| CrN | Yes | — |
| DLC | Yes | — |
| Electropolishing | Yes | — |
| HVOF Coating | Yes | — |
| MoS2 | Yes | — |
| Multilayer CVD | Yes | — |
| TiAlN | Yes | — |
| TiB2 | Yes | — |
| TiCN | Yes | — |
| TiN | Yes | — |
| WC/C | Yes | — |
They share 1 finish: Plasma Spray.
Grade 2 vs Ti Grade 18 — frequently asked
Is Ti Grade 18 stronger than Grade 2?
Yes. Ti Grade 18 has a typical yield strength of 570 MPa (82.7 ksi) against 380 MPa (55.1 ksi) for Grade 2 — about 50% more. Tensile strength is 690 MPa (100 ksi) vs 440 MPa (63.8 ksi).
Which is cheaper, Grade 2 or Ti Grade 18?
Ti Grade 18 is the lower-cost material: it sits in the high tier ($$$$) while Grade 2 is specialty ($$$$$). 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 18?
Grade 2. Its machinability rates fair (40/100) against poor (25/100) for Ti Grade 18; for welding the order is Grade 2 first (excellent, 90/100) then Ti Grade 18 (very good, 80/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in Grade 2 and Ti Grade 18 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.