Titanium

Titanium alloy platesare non-magnetic metals that cannot be magnetized in large magnetic fields. They are also non-toxic and compatible with blood, so they are used in the medical field.
Titanium alloy plates are used to make aircraft engine compressor components:
Titanium alloy platesare used to manufacture rockets, missiles, and aircraft structural parts, aircraft frames, skins, engine parts, beams, etc.;
Titanium alloy platesare used to manufacture chemical heat exchangers, pump bodies, distillation towers and other chemical heat exchangers, valves, pumps, power station condensers, accelerators for petroleum refining and seawater desalination, and environmental pollution control devices that are corroded by seawater.

In the 1960s, the use of Da alloy began to move from the rear fuselage to the middle fuselage, and some of them were engaged in the manufacturing of important load-bearing components such as bulkheads, beams, and flap slide rails using structural steel. The amount of alloy used in military aircraft has increased rapidly, reaching 20% to 25% of the weight of the aircraft structure.