TR-90 (Plastic titanium) is a polymer material having a memory, and is currently the most popular ultra-light frame material with super toughness, crashworthiness wear, low friction coefficient, which can effectively prevent the movement because frames broken, causing friction on the eyes and facial injuries. Its specific molecular structure, good chemical resistance, high temperature environment is not easy deformation, a short 350 degree heat resistant, easy to melt and burn. No chemical residue release, in line with European requirements for food grade material. TR90 frame surface lubricity, density 1.14-1.15, will float on the salt, than other plastic frames light, about less than half the weight plate frame, 85% nylon material, can reduce the nose, ears burden for young people to use . Product wear TR90 material, good chemical resistance, solvent resistance, weather resistance, non-flammable, high temperature. TR90 memory polymer materials, the resistance to deformation index 620kg / cm2, easily deformed.