The most popular frame materials include:
- Acetate/Zyl: These are different versions of a plastic frame material.
- Titanium: This metal alloy is very strong, yet lightweight, and is oftentimes hypoallergenic.
- Monel: This is a mixture of a broad range of metals that is malleable and corrosion-resistant.
- Flexon: This is a titanium-based alloy – also called a “memory metal” because it comes back into shape after twisting or bending – that is lightweight, hypoallergenic and corrosion-resistant.
- Aluminum: This is a lightweight and highly corrosion-resistant metal.
- Stainless Steel: This is a lightweight, low toxicity and strong metal that is also typically nickel-free, making it hypo-allergenic.
- Beryllium: This is a steel-gray metal that resists corrosion and tarnish, making it a good choice for those who spend a lot of time in or around salt water.
- Wood or Faux Wood: True wood is often used for sustainability purposes to create frames. Sometimes, faux wood finishes are applied to frames for fashionable purposes.