Material: Stainless steel
Stainless steel frames and surgical stainless are an alternative to titanium. Qualities of stainless steel frames include lightweight, low toxicity and strength; many stainless steel frames also are nickel-free and thus hypoallergenic. Stainless steel is readily available and reasonably priced. It’s an alloy of steel and chromium, which provides excellent resistance to corrosion, abrasion, and heat.