What Is Titanium Bar: Definition, Classification & Production Methods

Titanium bars  are indispensable core basic metal materials for high-end equipment manufacturing, chemical engineering, medical care, aerospace and other fields. Boasting unique properties such as low density and high strength, excellent corrosion resistance, favorable biocompatibility, high temperature resistance and non-magnetism, they are gradually replacing traditional steel, aluminum alloy and other materials, becoming the preferred material for lightweight and corrosion-resistant working conditions.

Titanium bars are solid rods manufactured from pure titanium or titanium alloy via smelting, forming and precision finishing, with circular, square, hexagonal and other cross-sectional shapes. They are common basic profiles for titanium processing.

With a density of 4.51g/cm³, titanium bars feature light weight and superior specific strength compared with steel and aluminum. They resist corrosion from acids, alkalis, seawater and high temperatures, and are non-toxic with excellent biocompatibility. A dense oxide film forms on the surface of titanium materials, providing resistance to electrochemical corrosion. They also exhibit good plasticity, weldability and machinability. By adjusting chemical composition and processing techniques, titanium bars can meet the demands of anti-corrosion, high-strength, high-temperature-resistant and medical implantation scenarios, serving as core lightweight high-performance materials for high-end manufacturing.

1. Classification by Material Composition

(1) Commercially Pure Titanium Bars

Grades Gr1 to Gr4, with titanium content ≥99.5% and low impurity levels. They feature outstanding plasticity, weldability and corrosion resistance with low embrittlement risk and high cost performance. The mainstream grade Gr2 has a tensile strength of 440MPa, widely applied in anti-corrosion equipment for chemical industry and seawater desalination.

(2) Titanium Alloy Bars

Alloyed with aluminum, vanadium and other elements, they outperform pure titanium in strength, heat resistance and wear resistance. Common grades include Gr5, Gr7, Gr9 and Gr23:

• Gr5: Balanced comprehensive properties, widely used in aerospace and high-end machinery;
• Gr23: High-purity medical grade, applied in orthopedic and dental implant devices;
• Gr7: Superior resistance to crevice corrosion, suitable for chemical environments with severe corrosion.

2. Classification by Form, Appearance and Dimensional Tolerance

Black Skin Titanium Bars

Hot-rolled blanks covered with black oxide scale, featuring poor dimensional accuracy and rough surfaces. Used as blanks for further deep processing or rough machined parts with low requirements, at a low price.

Polished Titanium Bars

Produced by precision turning, polishing and grinding of black skin bars, with accurate dimensions, bright surfaces and no oxidation defects. As mainstream finished products, they are used in precision machinery, medical devices and aerospace components.

Special-Shaped Titanium Bars

Custom-manufactured non-circular cross-section bars such as square, hexagonal and trapezoidal types, mostly used for fasteners and special mechanical fittings.

3. Classification by Performance and Application

They are divided into anti-corrosion industrial, high-strength structural, high-temperature-resistant, biomedical and special precision titanium bars. Medical-grade titanium bars have strict impurity control and favorable biocompatibility; high-temperature-resistant titanium bars maintain stable performance above 500℃, applicable to aero-engines and high-temperature kilns.

The core production flow of titanium bars covers ingot smelting and billet making, plastic forming and precision finishing. Four mainstream processes including forging, hot rolling, hot extrusion and cold working are selected according to actual demands.

Forging
Divided into open die forging and die forging. High-temperature forging breaks coarse grains and eliminates internal defects to achieve dense microstructure and optimal comprehensive mechanical properties. Suitable for large-size high-strength titanium alloy bars supplied to aerospace, military industry and medical implants, and it is the mainstream process for Gr5 and Ti-6242S.

Hot Rolling
The mainstream mass production process for commercially pure titanium with high efficiency and low cost, producing black skin titanium bar blanks. Applicable to mass production of small and medium-sized Gr1 and Gr2 pure titanium bars for chemical and marine engineering; its drawback is poor dimensional accuracy, requiring subsequent precision finishing.

Hot Extrusion
Formed under high temperature and high pressure with uniform deformation, capable of producing thin-diameter, high-precision and special-shaped cross-section titanium bars with consistent finished product quality. Suitable for precision instruments and high-end fasteners, yet limited by low production capacity and higher costs.

Cold Working and Finishing
Secondary precision processing at room temperature, including cold rolling, cold drawing, precision grinding and turning. It corrects dimensions, removes oxide scale, brightens surfaces and refines surface grains. High-precision polished bars and medical titanium bars all require this finishing procedure.

Ruihang, as a direct manufacturer of titanium products, supply optimal quality raw materials for your precision components production. If you have any purchasing needs for Gr5 titanium alloy products, please feel free to contact us via email: Sam.Rui@bjrh-titanium.com