TitaniumTitanium is a silver-gray metal – Many frame manufacturers offer titanium and beta-titanium material styles these days; the life time will be very long because titanium is rust free, lightweight, durable, strong and does not corrode when exposed to salty sweat, thus highly recommended in acid atmospheres. Titanium is widely used for everything from the Gemini and Apollo space capsules to medical implants such as heart valves, so the price is quite expensive. The highlight benefit of titanium as a frame is its allergy free (bio-compatible) characteristic. It is also 48 % lighter than alloys, except for aluminum, so we can say that titanium is the best frame raw material at this moment.
Titanium is expensive and hard to warp. Thus, there are alloys made of aluminum, vanadium, commercially designated as "Beta-titanium", for instance.
Titanium eyewear can be produced in a variety of colors for a clean, modern look with a hint of color. And they're hypoallergenic.
Some titanium frames are made from an alloy that is a combination of titanium and other metals, such as nickel or copper. In general, titanium alloy frames cost less than 100% titanium frames and might caused allergy.
Pros : excellent resistance to corrosion, hypoallergenic, light, heat resistant, sturdy.
Cons : cannot be repaired. Hard to warp and polish, limited color selection.
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