1、 Strength characteristics of titanium screws

1. Tensile and yield strength

① The tensile strength of TC4 titanium alloy screws can reach 900-1100 MPa, which is equivalent to 10.9 grade high-strength steel, but its specific strength is 2.2 times that of steel.

② Other materials such as GR5 have higher tensile strength, reaching 1100 MPa, which is suitable for scenarios such as automobiles, aerospace, etc. that require lightweight and high load capacity.

③ The yield strength range is 950-1150 MPa, demonstrating excellent resistance to deformation.

2. Lightweight and high specific strength

① The density of titanium alloy is only 4.5 g/cm ³, which reduces the weight of screws of the same specification by 40% -50%.

② The high specific strength characteristics make it outstanding in lightweight designs such as avionics equipment and automotive spring components.

2、 The fusion problem of titanium screws

1. Causes of Fusion Phenomenon

① Titanium alloy has strong affinity and is prone to chemical reactions with materials such as aluminum and steel, leading to thread adhesion.

② Although the surface oxide film enhances corrosion resistance, it increases the fastening force between screws and screw holes, exacerbating the risk of fusion.

2. Typical Cases and Consequences

① In road vehicle maintenance, titanium screws that do not use anti melting agents are fused with aluminum conversion seats, resulting in complete thread adhesion. They need to be removed with strong tools or reverse taps, and may even damage the components.

② After complete integration, it may be necessary to replace core components such as the front fork, which incurs high maintenance costs.

3. Prevention and Solutions

① Use of anti melting agent: Special anti melting agent should be applied during installation to avoid direct metal contact.

② Surface treatment process: Anodizing or sandblasting can reduce surface activity and decrease the probability of chemical bonding.

③ Material matching optimization: Avoid direct coordination between titanium screws and easily reactive materials such as aluminum and magnesium, and prioritize the use of titanium alloy or composite material bases.

3、 Comprehensive application suggestions

1. High intensity scenes

TC4 or GR5 materials are preferred for aerospace and other fields, balancing strength and biocompatibility.

2. Lightweight and corrosion-resistant scenarios

Anodized titanium oxide screws can be used for cars, bicycles, etc. to achieve a balance between weight reduction and weather resistance.

3. High risk integration scenarios

When connecting aluminum or magnesium alloy components, it is mandatory to use anti melting agents and regularly check the thread status.