What is the material of the airplane shell?

Materials; The material of aircraft shell is mostly titanium alloy; Titanium alloy is a kind of high-performance material widely used in aerospace technology. Its most remarkable characteristics are light weight, high strength, good toughness and corrosion resistance. For making bicycle frames, titanium alloy is the only material with high strength, low density, excellent fatigue and corrosion resistance and low elastic modulus, and it is an ideal material for making bicycle frames. In addition, titanium alloys are also widely used in medical devices, chemical equipment, military and sports equipment. The complex processing technology and expensive materials are the main reasons for the high price of products. Like many alloy metals, titanium alloy is composed of titanium and some useful metal components to meet the requirements of material properties, but titanium accounts for more than 90% of its main components. There are two kinds of alloys widely used in aerospace technology, namely Ti6al4V (6% aluminum, 4% vanadium, 90% titanium) and Ti3al2.5V (3% aluminum, 2.5% vanadium, 94.5% titanium). Ti3AL2.5V is a special material for manufacturing high-strength pipes, while Ti6AL4V is mainly used for manufacturing fuselage in aerospace field. As a high-grade bicycle frame material, it should have high strength and hardness, and titanium alloy will be an excellent choice. Its weight is only 50% of that of steel, and its strength-to-weight ratio is 28.4% higher than that of Cr-Mo steel. At the same time, titanium alloy has good fatigue resistance, and the fatigue limit is twice that of steel. After a long period of use, the aluminum alloy frame is incomparable to the titanium alloy frame in this respect. As a kind of high-strength and low-density titanium alloy material applied to bicycle frame, it will not only make the frame thin and strong, but also make the frame more durable.