Titanium is extremely lightweight, yet strong and resistant while also being flexible. Among allergy sufferers, titanium is the most popular metal because it is nickel-free andanti-allergic. Titanium is also biocompatible and recyclable, making it a highly environmentally friendly material. Cleaning your titanium frame is also extremely uncomplicated. You can clean them regularly with the cleaning cloth provided. Every now and then you can clean your frame under clear water and if necessary a small amount of ph-neutral dishwashing detergent. Be sure to dry the frame thoroughly and gently with a soft cloth afterwards.