From a B2B sourcing view what exactly counts as a screw versus a bolt?

A screw is a threaded fastener driven into a tapped hole or soft material often with a pointed or blunt tip and various heads (hex pan countersunk socket). Bolts pair with nuts. For buyers the distinction affects inventory and assembly tooling. BJCJTi supplies both as standard titanium parts—DIN 933 hex screws DIN 912 socket screws DIN 7991 countersunk—in TA2 and TC4 letting distributors consolidate titanium sourcing from one Baoji plant.

What makes a titanium screw different from a standard steel screw?

A titanium screw uses pure titanium (TA1TA2) or alloy (TC4Ti-6Al-4V) instead of steel giving ~40% lower weight at 4.51 gcm³ non-magnetic behavior and a self-healing TiO₂ film that resists acid alkali and seawater 5–10× longer than stainless. BJCJTi machines these on fully automatic CNC lines in its 1500 m² facility so buyers get precise interchangeable screws certified to ISO9001 since 2014.

Which titanium grade should a buyer choose for a general-purpose screw?

For pure corrosion resistance in mild environments TA2 (Gr2) is cost-effective for high strength TC4 (Gr5 895–1100 MPa) is preferred. BJCJTi's engineers help buyers map grade to application during quoting drawing on 15+ years serving aerospace medical marine and automotive clients. This consultative approach avoids over-specifying (wasted cost) or under-specifying (premature failure).

Are titanium screws reusable and does removal damage them?

Titanium screws resist galling better with proper lubrication and can be reused where loads stay within rating though critical joints often specify new fasteners. BJCJTi recommends titanium-specific anti-seize grease for assembly and supplies guidance with OEM orders. Its thread-rolled finish also withstands repeated tightening better than cut threads extending service life in maintenance-heavy B2B equipment.

What certifications should importers request when buying titanium screws?

Request a material certificate (mill test report) spectrometer analysis hardness test salt-spray test and NDT where applicable. BJCJTi provides these as standard export documentation supported by SGS and TÜV third-party verification and ISO9001 since 2014. Importers working with the Baoji-based supplier benefit from China Titanium Valley's mature supply chain shortening lead times versus fragmented sourcing.

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What Is a Screw? What Is a Titanium Screw?

2023-11-23

The difference between screws, nuts, nuts, bolts, screws, and studs:

The standard saying is that there are no screws and nuts.

Screws are a common name, and those with external threads can be called "screws".

The shape of the nut is usually hexagonal, and the inner hole is an internal thread, which is used to cooperate with the bolt and tighten the related parts.

Nut is a common name, and the standard should be called "nut".

The head of the bolt is generally hexagonal, and the shank has an external thread.

The screw is small, the head has a flat head, a cross head, etc., and the shank has an external thread.

Studs should actually be called "double-ended studs". Both ends have external threads, and the middle is usually a polished rod. The long end of the thread is used to connect with the deep hole, and the short end is connected with the nut.

● 1. Common English expressions

● 2. Crew / Bolt / Fastener

● 3. Definition of thread

Thread action

✓ 1. Fastening and connecting function: suitable for most screw products at this stage.
✓ 2. Transmission effect (displacement effect): such as the micrometer used by QC to check the size.
✓ 3. Sealing function: such as the connection sealing of pipelines.

(Titanium Screw)

Titanium screws are fasteners mainly made of titanium or titanium alloys, featuring excellent strength, corrosion resistance and lightweight properties. They are often used in fields with high performance requirements.

1. The core characteristics of titanium screws

★ (1) High-strength & Lightweight
The strength of titanium is comparable to that of steel, but its density (approximately 4.5 g/cm³) is only 60% of that of steel and 1.5 times that of aluminum alloy. It is suitable for scenarios requiring weight reduction (such as in aerospace).
Titanium alloys (such as Ti-6Al-4V) have higher strength and can even replace high-strength steel.
★ (2) Outstanding corrosion resistance
Suitable for harsh conditions such as marine environments, chemical equipment, and medical implants.
★ (3) Biocompatibility
Pure titanium is non-toxic and has good compatibility with human tissues. It is commonly used in medical fields such as orthopedic screws and dental implants.
★ (4) Non-magnetic & High Temperature Resistant
Titanium is non-magnetic and is suitable for use in MRI equipment, electronic precision instruments, and other scenarios.
The working temperature range is wide (-250°C to 600°C), and it maintains its performance even at high temperatures.
⚠ (5) Disadvantages
High cost: The extraction and processing of titanium metal is complex, and its price is 5 to 10 times that of steel screws.
Processing is challenging: Titanium is prone to sticking to the cutting tool, and special tools are required for cutting.
Low conductivity: Not suitable for scenarios that require conductivity (such as circuit grounding).

2. Common titanium screw materials

material type	Characteristics and Uses
Pure titanium (Gr1 - Gr4)	High corrosion resistance, used in chemical industries and healthcare (such as Gr2 is the most common).
Ti-6Al-4V（Gr5）	High-strength titanium alloy, used in aviation, racing, and high-end sports equipment.
Ti-3Al-2.5V	Used for ships, bicycle parts, etc.

3. Application fields of titanium screws

● Aerospace: Aircraft structures, engine components (lightweight and resistant to high temperatures).
● Medical industry: Orthopedic screws, dental implants (biocompatible).
● Marine Engineering: Ships, submarines, seawater desalination equipment (resistant to salt fog corrosion).
● High-end sports equipment: Bicycles, golf clubs (lightweight + strength).
● Chemical/Energy: Reaction vessels, petroleum pipelines (resistant to acid and alkali corrosion).

4. How to choose titanium screws?

● Environmental requirements: For seawater and chemical environments, pure titanium (Gr2) or Ti-6Al-4V (Gr5) should be selected.
● Strength requirement: For high-load applications, select Ti-6Al-4V alloy.
● Budget: If you don't require the highest performance, stainless steel (such as 316) might be a more cost-effective option.