One of the most widely used thermoplastics in manufacturing is PEEK (polyetheretherketone) and for good reason. PEEK can produce parts with incredibly high levels of thermal, chemical, and wear resistance that has a superior strength-to-weight ratio than stainless steel and aluminum. This high-performance polymer material is used to make parts in almost every industry.
You can create nearly any custom shape and part complexity in a material that can withstand the harshest conditions if you combine the advantages of this plastic with the capabilities of 3D printing. It stands to reason that 3D-printed PEEK components are increasingly being used in place of metal in spacecraft, orthopedic implants, and even engine components in high-performance auto racing.