Titan is one of the most solid elements on Earth. Usually it is used with nickel and with aluminum. The alloy of nickel and titanium called Nitinol. This blend is unique because it saves the form. It consists of 55% titanium and 45% nickel. If we take a bar of this metal of some form, deform it, and then heated, the alloy will form up to the original strain. It is used in medicine and technology. Titanium alloy with aluminum a heat-resistant and resistant to oxidation that allows using them as structural metals. One of the main directions of the use of titanium alloys of various defense materials.