Titanium is the premium tier of metal eyewear. Buyers who need it already know the broad story: lighter than steel, stronger per unit weight, genuinely hypoallergenic. But when it comes to sourcing, the distinction between pure titanium and beta titanium matters — and it’s often poorly explained in factory catalogs.
Here’s a clear breakdown for B2B buyers who need to specify correctly.
The Basics: Two Different Materials
Pure Titanium (CP Titanium — Commercially Pure)
Pure titanium is, as the name implies, titanium without significant alloying. In eyewear, Grade 1 or Grade 2 commercially pure titanium is standard. Key characteristics:
- Composition: 99%+ titanium, minimal trace elements
- Density: ~4.5 g/cm³ (about 40% lighter than steel)
- Hardness: Relatively soft compared to alloys — scratches more easily
- Flexibility: More ductile; bends without cracking, good for adjustable temples
- Hypoallergenic: Yes — no nickel, no cobalt, no sensitizing metals
- Weldability: Requires specialized argon-arc welding; harder to process
- Cost: Lower raw material cost than beta-ti alloys, but processing is complex
Pure titanium frames are typically laser-welded or argon-arc welded, not soldered. Factories that claim to produce “pure titanium” but use soldering (common with cheaper alloys) are not telling you the full story.
Beta Titanium (Ti-3Al-2.5V or Ti-15V-3Cr-3Sn-3Al)
Beta titanium is a titanium alloy with added elements (typically aluminum, vanadium, chromium) that stabilize the beta phase of the crystal structure. This changes the material properties significantly:
- Composition: Titanium + 3–15% alloying elements (varies by specific alloy)
- Density: Similar to pure titanium (~4.4–4.8 g/cm³)
- Hardness: Significantly harder and stronger than pure titanium
- Flexibility: Excellent spring memory — deforms and returns to shape (key for spring hinges)
- Hypoallergenic: Yes — still no nickel
- Machinability: Better than pure titanium; easier to stamp and form into complex shapes
- Cost: Higher than pure titanium due to alloy composition and processing
Where Each Material Works Best in Frame Design
| Frame Component | Pure Titanium | Beta Titanium |
|---|---|---|
| Rims (front frame) | ✓ Standard use | ✓ Standard use |
| Temples (arms) | ✓ Good; can be adjusted by optician | ✓✓ Better spring memory; holds adjustment |
| Spring hinge mechanism | Limited (material too soft for spring function) | ✓✓ Preferred — the spring property is the point |
| Nose bridge (fixed) | ✓ Standard | ✓ Standard |
| Nose bridge (adjustable pads) | ✓ Better — more ductile, easier to adjust | Possible but stiffer |
| Rimless mounting | ✓ Standard | ✓ Standard |
In practice, many high-end titanium frames use both materials: pure titanium for the front frame (where adjustability and weld points matter), beta titanium for the temples (where spring memory and strength matter). This combination is sometimes called “mixed titanium” in factory specs — don’t confuse it with cheaper monel-titanium hybrid frames.
How to Verify Titanium Quality When Sourcing
Titanium claims in the eyewear industry are frequently exaggerated. Here’s what to check:
1. Ask for material certification
Legitimate titanium suppliers can provide material test reports. These show actual composition. “We use titanium” without documentation is not enough for a serious specification.
2. Check the welding method
Pure and beta titanium require argon-arc welding or laser welding. If the join points on a “titanium” sample show silver solder (look for slightly different color, smoother fillet than a weld), you may be looking at a titanium-clad monel or stainless steel frame rather than true titanium.
3. Weight test
Titanium feels remarkably light. A full metal optical frame in pure titanium should weigh under 15g. If a claimed titanium frame weighs 20g+, the base material may be stainless steel or monel with titanium plating.
4. Flame test (for verification only, not production use)
True titanium doesn’t tarnish when exposed to a flame at low temperatures — it oxidizes to produce iridescent colors (gold, blue, purple) rather than the blackening you’d see with steel or monel. This is a rough field test, not a specification tool, but it can flag obvious misrepresentation in a sample.
Price Range and Market Positioning
Rough FOB ex-factory pricing for titanium frames:
- Pure titanium optical frame (standard design): $8–$15 FOB
- Beta titanium temples + pure titanium front: $12–$20 FOB
- Full beta titanium (complex design, spring hinges): $15–$28 FOB
- Rimless pure titanium: $10–$18 FOB
At retail, titanium frames typically position at $120–$400+ for optical, $150–$600+ for premium sunglasses. The margin structure is strong, but so is the customer expectation — material claims need to be defensible.
MOQ and Lead Time
- MOQ: 300–500 pcs per color/style (new molds add cost)
- Lead time: 45–60 days for standard styles; 60–75 days for custom designs with new tooling
- Sampling: 3D prototype in 7–14 days; production sample in 20–25 days
The Short Version
Pure titanium: lighter, more adjustable, hypoallergenic, easier on sensitive skin. Good for optical frames where an optician will adjust fit.
Beta titanium: harder, stronger, better spring memory. The right choice for temples, spring hinge mechanisms, and frames that need to hold their shape without constant adjustment.
If you’re building a premium optical or fashion sunglass line and want to get the material specification right — or if you’ve been burned by a “titanium” product that turned out to be something else — we’re happy to walk through the options with documentation.
→ mimi@wenzhouframe.com | WhatsApp: +86 152 5809 0639
