The workblank supply form of F-15 fighter titanium alloy structure parts is mainly forgings. According to statistics, the flight uses a total of more than 500 forgings, including 108 items of titanium alloy, including 3 wing beam inside the wing, tail girder and the main bearing frame are integral Ti-6Al-4V forgings, especially the width of bearing frame reaches 3 metres, is a super large titanium alloy forgings; Some titanium alloy parts with thinner webs also adopt isothermal forging process at that time. In terms of the assembly, a large of Ti-6Al-4V titanium alloy fasteners are used.
In general, F-15 fighter the main titanium alloy material used include Ti-6Al-4V、Ti-6Al-6V-2Sn、Ti-3Al-2.5V and others titanium alloy. Its large structure parts, fatigue resistance siding parts and connecting fasteners mostly adopt Ti-6Al-4V titanium alloy. The small structure parts and low fatigue resistance siding parts are all made of Ti-6Al-6V-2Sn.Pressing and fuel pipe fittings are basically made of Ti-3Al-2.5V titanium alloy. The main rivet in composite skin connection mainly use Ti-45Nb titanium alloy. 601.91kg titanium was used for fighter wing, 132.44kg titanium for horizontal tail wings, 65.77kg titanium for vertical empennage, the 1152.57kg titanium for fuselage, 43.09kg titanium for undercarriage, 32.65kg titanium for engine compartment, 62.59kg titanium for air-inlet system and 2091.06kg titanium for whole fighter.