1、 Core performance comparison

1. Weight and density

The density of titanium screws is about 4.51 g/cm ³, while that of stainless steel screws is about 7.9-8 g/cm ³; Under the same specifications, titanium screws are over 40% lighter in weight.

The lightweight advantage makes titanium screws the preferred choice for aerospace and precision electronic equipment.

2. Strength and durability

Titanium screws have significantly higher strength than stainless steel, with a tensile strength of over 900 MPa, which is about 50% higher than stainless steel screws.

Titanium alloy has excellent fatigue resistance and creep resistance, and is more stable under long-term high-pressure environments.

3. Corrosion resistance

Titanium screws have almost no corrosion in strong acid, strong alkali, seawater, and chloride ion environments, while stainless steel is prone to rusting under the same conditions.

The dense oxide film (TiO ₂) formed on the surface of titanium endows it with "self-healing" anti-corrosion ability.

4. Environmental adaptability

Temperature range: Titanium screws have a temperature resistance range of -250 ° C to 600 ° C, while stainless steel tends to soften above 400 ° C.

Diamagnetism: Titanium screws are completely non-magnetic and suitable for precision instruments such as MRI equipment; Stainless steel may be subject to magnetization interference.

5. Biocompatibility

Titanium screws are non-toxic and compatible with human tissues, widely used in orthopedic implants such as bone screws and joints; Stainless steel may cause metal allergies.

2、 Differences in application scenarios

Aerospace: aircraft structural components, rocket engines (weight reduction+high temperature resistance), non load bearing components, ground equipment;

Chemical/Marine: seawater desalination equipment, chemical reaction vessels (corrosion-resistant), ordinary pipelines, low-pressure vessels;

Electronics: Internal structure of high-end devices (without magnetic interference), shell, and ordinary connectors.

3、 Cost and Process

Raw material cost: The price of titanium screws is 5-10 times that of stainless steel screws of the same specification.

Processing difficulty: Titanium alloy has poor thermal conductivity and is prone to sticking and hardening during processing, requiring specialized equipment and low-speed cutting technology.

Surface treatment: Titanium screws can achieve a colorful appearance through anodizing, combining aesthetics and wear resistance; Stainless steel is often plated or passivated.

4、 Precautions for use

Avoid mixing: Direct contact between titanium and stainless steel may cause galvanic corrosion, and insulation gaskets should be used for isolation.

Distinguishing authenticity: Genuine titanium screws make a crisp sound when lightly tapped, stainless steel is dull, titanium is non-magnetic, and stainless steel can be attracted by magnets.