Thanks a lot guys.  
 
Titanium is indeed inside the nose bridge.  
 
 
 
 
@ Twenty Fifty : you mean that I may have a Titanium A-Wire 2.0 Spring Hinge like Rick? I cannot find anywhere else this kind of A-Wire 2.0. All the others look like the official photoshop pic! 
 
Here is an example of another real A-Wire 2.0 Spring Hinge frame : 
 
