The producers told us : this racket was made by Titanium, Nickel;that racket was made by Nano-carbon etc. When we choose and purchase their products, we can look at exterior features of them, we donot know exactly about the chemical elements in the components of them. We donot have labolatoties to analyse our racket's material qualitative. No one knows whether they were made by the same material but the different painting over. Do you distinguish of your rackets material basing your experiences or feeling ? Are you (and me) too trusting of the producers to pay again and again for the so-called " new and higher-technical stuff " rackets?