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China Titanium CNC Machining: Quality Parts from Certified Suppliers & Factory for Aerospace and Medical Applications
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. | ||
Frequently Asked Questions
What is the difference between Titanium Grade 2 and Grade 5?
Titanium Grade 2 is commercially pure titanium with excellent formability, weldability, and corrosion resistance, but lower strength. Grade 5 (Ti-6Al-4V) is an alpha-beta alloy that offers significantly higher yield and tensile strength — making it ideal for structural and load-bearing applications — while Grade 2 excels in corrosion-sensitive or biocompatible environments.
Is titanium difficult to CNC machine compared to steel or aluminum?
Yes, titanium is generally more challenging to machine than aluminum and many steels. It has low thermal conductivity, which causes heat to concentrate at the cutting edge, and it tends to work-harden during machining. Specialized tooling, appropriate cutting speeds, and proper coolant strategies are essential for achieving good results with titanium alloys.
Which titanium grade is best suited for medical implants?
Titanium Grade 5 (Ti-6Al-4V) is the most widely used alloy for load-bearing surgical implants such as joint replacements and bone plates, due to its high strength and excellent biocompatibility. Titanium Grade 2 is preferred for non-load-bearing medical device housings and components where superior corrosion resistance and formability are prioritized.
What surface finishes are available for CNC machined titanium parts?
CNC machined titanium parts can be finished with a variety of surface treatments including as-machined, bead blasting, anodizing (Type II and Type III), passivation, polishing, and electropolishing. The choice of finish depends on the application requirements such as aesthetics, corrosion resistance, or biocompatibility.
Why is titanium preferred in aerospace applications?
Titanium's exceptional strength-to-weight ratio — combined with its ability to withstand high temperatures, resist corrosion, and maintain fatigue strength under cyclic loading — makes it indispensable in aerospace. Grade 5 titanium, in particular, is used extensively in airframes, engine components, and landing gear where both weight savings and structural integrity are critical.
How do I choose between Titanium Grade 2 and Grade 5 for my project?
Consider your application's primary requirements: if your part needs maximum corrosion resistance, excellent weldability, or biocompatibility in a non-load-bearing context, Grade 2 is the better choice. If your application demands high structural strength, fatigue resistance, and a lightweight profile — such as in aerospace, motorsport, or orthopedic implants — Grade 5 (Ti-6Al-4V) is the recommended option.
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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