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China Titanium CNC Machining Factory: High-Quality Custom Parts from Trusted Suppliers
Titanium Alloy CNC Machining
Titanium is a high-performance metal with strength comparable to many steels but a density only about 60% that of steel. This unparalleled strength-to-weight ratio, combined with its outstanding corrosion resistance in harsh environments (such as seawater and bodily fluids), makes it the ideal choice for demanding applications. Our Instant Quoting Engine supports CNC machining for various titanium alloys.
Titanium Grade 2 (CP Ti, Gr.2)
Titanium Grade 2 is commercially pure titanium, offering the best formability, weldability, and excellent corrosion resistance among titanium alloys. While its strength is lower than Grade 5, its superb biocompatibility and corrosion resistance make it widely popular in chemical processing, marine, and medical (non-implant) fields.
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Typical Applications: Chemical processing equipment components, piping for desalination systems, medical device housings, non-load-bearing aerospace structures.
Titanium Grade 2 Typical Properties (Annealed)
| Property | Value | Notes |
|---|---|---|
| Yield Strength (MPa) | ≥ 275 | Good balance of ductility and strength |
| Tensile Strength (MPa) | ≥ 345 | |
| Elongation at Break (%) | ≥ 20 | Excellent ductility |
| Hardness (Vickers) | ~ 150 | |
| Density (g/cm³) | 4.51 | ~40% lighter than steel |
| Generalized values. Specific properties depend on heat treatment and specification. | ||
Titanium Grade 5 (Ti-6Al-4V, Gr.5)
Titanium Grade 5 (Ti-6Al-4V) is the most commonly used and representative alpha-beta titanium alloy, often called the "workhorse alloy." It provides an extremely high strength-to-weight ratio and excellent fatigue strength while maintaining good corrosion resistance, making it the primary choice for critical applications requiring both lightweight and high strength.
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Typical Applications: Aerospace structural components (airframe, landing gear), aircraft engine parts, high-performance automotive racing components, surgical implants (joints, bone plates), high-end sporting equipment.
Titanium Grade 5 Typical Properties (Solution Treated and Aged)
| Property | Value | Notes |
|---|---|---|
| Yield Strength (MPa) | ≥ 828 | Strength significantly exceeds Grade 2 |
| Tensile Strength (MPa) | ≥ 895 | |
| Elongation at Break (%) | ≥ 10 | Maintains good plasticity at ultra-high strength |
| Hardness (Rockwell C) | ~ 36 | |
| Density (g/cm³) | 4.43 | Similar to Grade 2 |
| Generalized values. Specific properties depend on heat treatment and specification. | ||
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Frequently Asked Questions
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What is the difference between Titanium Grade 2 and Grade 5 for CNC machining?
Titanium Grade 2 is commercially pure titanium offering excellent corrosion resistance and formability but lower strength. Grade 5 (Ti-6Al-4V) is an alpha-beta alloy with significantly higher strength (yield strength ≥828 MPa vs ≥275 MPa) and superior fatigue performance, making it suitable for high-stress structural applications. Grade 2 is preferred where biocompatibility and corrosion resistance are paramount, while Grade 5 is chosen for critical load-bearing parts.
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Why is titanium considered difficult to machine compared to other metals?
Titanium's low thermal conductivity causes heat to concentrate at the cutting edge rather than dissipating into the chip, accelerating tool wear. Its high chemical reactivity also causes it to bond with cutting tools at elevated temperatures. Additionally, titanium's springback effect and tendency to work-harden require precise machining parameters, sharp tooling, and appropriate cutting fluids to achieve quality results.
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Which industries most commonly use titanium CNC machined parts?
Titanium CNC machined parts are most widely used in aerospace (structural airframe components, engine parts), medical and orthopedic industries (surgical implants, prosthetics), marine and offshore industries (corrosion-resistant hardware), chemical processing (piping, valves), and high-performance automotive and sporting equipment sectors.
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Is Titanium Grade 5 (Ti-6Al-4V) biocompatible and suitable for medical implants?
Yes. Titanium Grade 5 (Ti-6Al-4V) is widely used in surgical implants such as joint replacements, bone plates, and dental implants due to its excellent biocompatibility, corrosion resistance in bodily fluids, and high strength-to-weight ratio. It meets the requirements of major medical standards and is one of the most trusted materials for load-bearing implant applications.
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What surface finishes are available for titanium CNC machined parts?
Titanium CNC machined parts can be finished with a variety of surface treatments including as-machined, bead blasting, anodizing (Type II or Type III), electropolishing, passivation, and polishing. Anodizing titanium can produce a range of colors through oxide layer thickness variation, which is popular for both functional and aesthetic purposes in aerospace and medical applications.
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How do I choose between Titanium Grade 2 and Grade 5 for my project?
Choose Titanium Grade 2 if your application requires maximum corrosion resistance, excellent formability, or biocompatibility for non-load-bearing medical devices, chemical processing, or marine environments. Choose Titanium Grade 5 if your application demands high mechanical strength, fatigue resistance, and lightweight performance — such as aerospace structural parts, surgical implants, or high-performance engineering components. When in doubt, consult with our engineering team for material selection guidance.
Finishes and Post-Processing Options
The zinc alloy substrate is highly suitable for various surface treatments to enhance decoration, protection, or functionality:
Electroplating: Such as chrome, nickel, gold, or silver plating, providing a highly decorative appearance, excellent wear and corrosion resistance. This is the most common choice.
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Passivation or Chromate Conversion Coating:
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Powder Coating:
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Painting:
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Physical Vapor Deposition (PVD):
Design and Machining Considerations
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Process Selection:
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Design Considerations:
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Material Selection:
Zamak 3 and 5 are suitable for the vast majority of general-purpose parts requiring good appearance and strength; ZA-8 is better for wear and bearing applications; for making rapid tooling, choose specialized alloys like Kirksite.
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