What Is The Titanium Bar Manufacturing Process?

Titanium and titanium alloy bars has high strength, low density, excellent corrosion resistance, and good biocompatibility, and are widely used in high-end fields. It serves as critical materials for modern industry. Their manufacturing quality determines service performance and safety reliability, and strict technical requirements are the core of quality assurance.

 

 

 

The performance depends on the purity and grade of raw materials. Commercial pure titanium or titanium alloys should be selected according to application scenarios. As a commonly used α+β type titanium alloy. Impurities such as oxygen, nitrogen, carbon, and iron in raw materials must be strictly controlled. Impurities are required to reach the ppm level to ensure biocompatibility and mechanical properties for medical titanium bars,.

 

 

Titanium is chemically active and easy to embrittle due to reactions with oxygen and nitrogen at high temperatures. Melting must be carried out under vacuum or inert gas protection to obtain high-quality titanium ingots with uniform composition.

 

With mature process and moderate cost, it is suitable for ordinary industrial titanium bars, but difficult to remove high-density impurities.

It is capable of filtering impurities and achieving higher purity, mostly used in aerospace and high-end medical fields. Parameters such as current, voltage, and melting rate must be precisely controlled during melting to prevent shrinkage cavities and composition segregation, ensuring stable quality of titanium ingots.

 

 

Forging and hot rolling are the key steps in machining titanium ingots into titanium bars, mainly adopting forging and rolling to refine grains, eliminate defects, and improve mechanical properties.

 

1. Heating and pressing titanium ingots with a forging ratio of not less than 3:1, which can compact internal defects and is suitable for large-size and high-performance titanium bars.

 

2. Rolling titanium blanks into finished products with good dimensional and surface quality, suitable for mass production of small and medium-size titanium bars.

 

Temperature, deformation speed, and deformation amount shall be controlled during processing: processing in the α+β phase region improves strength, while processing in the β phase region enhances toughness.

 

 

Heat treatment is mainly used to adjust the microstructure of titanium bars and optimize mechanical properties. Common processes include homogenizing annealing, recrystallization annealing, and solution + aging treatment.

 

• Homogenizing annealing eliminates composition segregation and uniformizes the microstructure.

Recrystallization annealing refines grains, restores plasticity, and prevents embrittlement.

• Solution + aging treatment is mostly used for α+β type titanium alloys to greatly improve strength, suitable for aerospace applications.
• Temperature, holding time, and cooling rate must be strictly controlled during heat treatment to prevent grain coarsening and non-uniform microstructure.

 

 

Surface treatment is used to remove oxide scale and impurities from titanium bar surfaces, improve surface quality, corrosion resistance, and fatigue life. Common processes are as follows:

 

1. Removes oxide scale as a basic treatment process.

2. Cleans the surface and forms compressive stress, significantly improving fatigue life, mostly used for aviation components.

3. Reduces surface roughness and bacterial adhesion, suitable for medical titanium bars.

4. Forms an oxide film to enhance corrosion resistance and enable coloring, used in high-end electronics and decorative fields.

 

 

Finished product inspection is the final check for titanium bar quality, requiring comprehensive testing of chemical composition, mechanical properties, dimensional accuracy, surface and internal defects to meet standards. Inspection items include:

Spectral testing for chemical composition

 

• Mechanical property tests (tensile, impact, etc.)
• Dimensional inspection in accordance with GB/T 2965-2023
• Visual and microscopic inspection for surface defects
• Non-destructive testing (ultrasonic, eddy current, X-ray, etc.)
• Metallographic structure observation
• Unqualified products must be reworked or scrapped and are strictly prohibited from entering the market.

 

Baoji Ruihang, a manufacturer of titanium and non-ferrous metal products, is specialized in R&D, production and sales. A pofessional service team is standing by for your inquiry. For more details, please do not hesitate to contact us by email: Sam.Rui@bjrh-titanium.com.