I have been asked to make a presentation at school about titanium and I have decided to do it with respect to its use in sport. The only problem that I am having is with trying to do some sort of calculation to calculate the required elastic modulus/ tensile strength/ hardness value required for a specific use. I was thinking of trying to calculate the force dissipated by the titanium grille of a cricket helmet. Has anybody got any better ideas or can help me with this calculation??