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Grade 4 Titanium Foil (Light Tight)
Available Configurations
Properties common to all products in this list
| Thickness | Width | Length | Standards | Other Variants |
|---|---|---|---|---|
| 0.25mm | 25mm to 304.8mm | 25mm to 600mm | ASTM B265 | Non Light Tested; High Purity (≤ 99.999%); Grade 1; Grade 2 |
Need custom configurations? Please contact us.
Key Features
Grade 4 Titanium possesses a combination of material characteristics that make it particularly well suited for aerospace, biomedical, chemical processing, electronics, and energy applications:
Excellent Corrosion Resistance
Grade 4 Titanium naturally forms a stable oxide layer (TiO₂) that protects it from corrosion in aggressive environments, including seawater, chlorides, and strong acids. This makes it valuable in marine, chemical, and biomedical systems.
Highest Strength Among Commercially Pure Titanium Grades
Grade 4 Titanium offers the highest yield strength of the commercially pure titanium grades, with typical values of 480–550 MPa. This makes it the preferred choice where maximum strength is required without the addition of alloying elements, such as in structural aerospace components, high-pressure chemical plant, and demanding medical device applications.
High Melting Point (1,668 °C)
Grade 4 Titanium's high melting point ensures structural stability under extreme heat, supporting its use in high-temperature tooling, aerospace shielding, and furnace components.
Biocompatibility
Grade 4 Titanium is bioinert and non-toxic, making it ideal for long-term contact with biological tissues. Its higher strength relative to lower grades makes it particularly suited to load-bearing medical implants, dental components, and surgical instruments where mechanical performance and biocompatibility must be combined.
Weldability & Fabricability
Grade 4 Titanium is weldable by TIG, MIG, and electron beam methods with inert gas shielding. While less ductile than Grades 1 and 2, it can be formed and fabricated into precision components with appropriate tooling, supporting its use in complex assemblies across aerospace and chemical processing industries.
Surface Engineering & Oxide Layer Control
Grade 4 Titanium's surface can be engineered through anodisation or oxidation to tailor its optical, electronic, or catalytic properties — useful in sensors, coatings, and energy devices.
Industrial Applications
Grade 4 Titanium is used across high-technology sectors for its industry-leading strength among commercially pure titanium grades, combined with corrosion resistance, biocompatibility, and thermal stability:
- ✦ Aerospace & Propulsion Systems
- Grade 4 Titanium is used in structural components, thermal shielding, and engine parts where the highest strength-to-weight ratio in the commercially pure titanium family is required. Its oxidation resistance supports long-term performance in high-altitude and space environments.
- ✦ Medical & Biomedical Devices
- Biocompatible and non-toxic, Grade 4 Titanium is used in load-bearing implants, dental components, surgical instruments, and biosensors where higher mechanical strength than lower CP grades is needed alongside long-term compatibility with biological tissue.
- ✦ Chemical Processing & Marine Engineering
- Grade 4 Titanium lines tanks, heat exchangers, and piping systems exposed to aggressive chemicals and seawater. Its resistance to chlorides and acids, combined with superior strength, ensures durability in the most demanding industrial and offshore environments.
- ✦ Electronics & Semiconductor Fabrication
- Used as a diffusion barrier, electrode substrate, and thin-film base layer, Grade 4 Titanium supports high-precision manufacturing in capacitors, sensors, and microelectronic devices.
- ✦ Energy Storage & Conversion Systems
- Grade 4 Titanium is employed in battery current collectors, fuel cell membranes, and hydrogen storage systems due to its corrosion resistance, mechanical robustness, and surface engineering potential.
- ✦ Optical & Surface Coating Technologies
- Grade 4 Titanium's surface can be anodised or oxidised to produce interference colours or functional coatings, making it useful in optical filters, sensors, and decorative or functional surface treatments.
Synonyms
Material Properties
| Element | Value |
|---|---|
| Atomic number | 22 |
| Crystal structure | Hexagonal close packed |
| Electronic structure | Ar 3d² 4s² |
| Valences shown | 2,3,4 |
| Atomic weight( amu ) | 47.88 |
| Thermal neutron absorption cross-section( Barns ) | 6.1 |
| Photo-electric work function( eV ) | 4.1 |
| Natural isotope distribution( Mass No./% ) | 50/ 5.3 |
| Natural isotope distribution( Mass No./% ) | 49/ 5.5 |
| Natural isotope distribution( Mass No./% ) | 46/ 8.0 |
| Natural isotope distribution( Mass No./% ) | 48/ 73.7 |
| Natural isotope distribution( Mass No./% ) | 47/ 7.5 |
| Atomic radius - Goldschmidt( nm ) | 0.147 |
| Ionisation potential( No./eV ) | 3/ 27.5 |
| Ionisation potential( No./eV ) | 4/ 43.3 |
| Ionisation potential( No./eV ) | 5/ 99.2 |
| Ionisation potential( No./eV ) | 1/ 6.82 |
| Ionisation potential( No./eV ) | 2/ 13.6 |
| Ionisation potential( No./eV ) | 6/ 119 |
| Element | Value |
|---|---|
| Material condition | Polycrystalline |
| Material condition | Annealed |
| Poisson's ratio | 0.361 |
| Poisson's ratio | 0.361 |
| Poisson's ratio | - |
| Bulk modulus( GPa ) | 108.4 |
| Bulk modulus( GPa ) | - |
| Bulk modulus( GPa ) | 108.4 |
| Tensile modulus( GPa ) | - |
| Tensile modulus( GPa ) | 120.2 |
| Tensile modulus( GPa ) | 120.2 |
| Izod toughness( J m⁻¹ ) | 61 |
| Izod toughness( J m⁻¹ ) | 61 |
| Hardness - Vickers( kgf mm⁻² ) | 60 |
| Hardness - Vickers( kgf mm⁻² ) | 60 |
| Tensile strength( MPa ) | 230-460 |
| Tensile strength( MPa ) | 230-460 |
| Yield strength( MPa ) | 140-250 |
| Yield strength( MPa ) | 140-250 |
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 54@20°C |
| Superconductivity critical temperature( K ) | 0.4 |
| Temperature coefficient( K⁻¹ ) | 0.0038@0-100°C |
| Element | Value |
|---|---|
| Boiling point( C ) | 3287 |
| Density( gcm⁻³ ) | 4.5@20°C |
| Element | Value |
|---|---|
| Melting point( C ) | 1660 |
| Latent heat of evaporation( J g⁻¹ ) | 8893 |
| Latent heat of fusion( J g⁻¹ ) | 365 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 523@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 21.9@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 8.9@0-100°C |
Tolerances
| Thickness | <0.01mm | ±25% |
|---|---|---|
| Thickness | 0.01mm - 0.05mm | ±15% |
| Thickness | >0.05mm | ±10% |
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |