International market situation of titanium alloy for aviation

Titanium alloy has low density, high specific strength, good corrosion resistance, low thermal conductivity, non-toxic non-magnetic, welding can be adornment sex is strong, good biocompatibility, surface features, is a kind of lightweight high strength and corrosion resistant structure materials, has wide application prospect in the weapon equipment, and have been widely used in aviation, aerospace, chemical, petroleum, electric power, medical, construction, sporting goods and other fields. As one of the main structural materials of aircraft body structure and aircraft engine, the application level of titanium alloy is one of the important indicators to measure the advanced degree of aircraft material selection, and is an important aspect to affect the tactical performance of aircraft. In the third generation fighter aircraft abroad, the ratio of titanium alloy to the weight of the body structure is 20% ~ 25%, and in the fourth generation fighter F-22(EMD), it has reached 41%, and its application is on the rise. The amount of titanium used in aero-engines is also gradually increasing. The amount of titanium used in foreign advanced aero-engines has reached about 30%, for example, the amount of titanium used in V2500 engines is as high as 31%, and the amount of titanium used in F119 engines is 40%. In terms of civil aircraft, the titanium alloy consumption is also increasing gradually. A380 titanium takes up 10% of the total weight, and titanium material used for single aircraft is about 60 tons (Figure 1). Airbus has increased its titanium use from 4.5% of the third-generation A320 to 6% of the fourth-generation A340, and the forthcoming A350 jet will use 15% more titanium. The rapid development of national defense system and civil aviation system in the world requires the aircraft and its engine to continuously improve the service performance, improve safety and reliability and reduce the whole life cost by reducing structural weight and other effective ways. The past 60 years, alloy of titanium alloy through continuous innovation, technological innovation and engineering application, never stopped to dig up repeatedly titanium potential ability, its than strength, heat resistance, corrosion resistance, etc, the superiority of fully exert increasingly, the high cost problem is dealt with different levels of gradually, use reliability also constantly improve with design experience accumulated. The development trend of titanium alloy just ADAPTS to the increasing demand of aviation industry, and even promotes the development of aircraft and engine in some aspects in advance.