The use of metallics technologies such as titanium Hot Isostatic Pressed (HIP) castings and electron beam welding allowed the airframe designers to incorporate complex features into a single component without the weight of fastened assemblies. However, the extensive application of Resin Transfer Molding (RTM) technology and high temperature bismaleimide (BMI) composite materials directly resulted in the high weight/performance efficiency the Raptor demonstrates. The overall percentage of composites in the F-22 (approximately 25%) is historically high, though not unprecedented. ![]() Validating structural materials is especially important to the F-22 because new material technologies were incorporated to maximize aircraft performance.
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