Complex sentence: Both tin and copper are relatively soft metals that will deform on striking by alloying the two elements a harder and more rigid metal is created but also one with more elasticity than the use of one of the metals alone.
Split into simpler sentences: Both tin and copper are relatively soft metals that will deform on striking. By alloying the two elements a harder and more rigid metal is created but also one with more elasticity than the use of one of the metals alone.