Beyond its uses in jewelry, titanium is recognized as a strategic metal due to its ability to lend its strength to lighter metals in order to create strong, lightweight alloys. These lightweight alloys, along with titanium's heat resistance make it an ideal metal for use in aerospace technologies, for instance in airplanes and jet engines. Titanium is also used in defense and military applications, such as in missiles and rockets.Due to titanium's high corrosion resistance, it is also used in marine component engineering and the pulp and paper industry. Unlike other metals, titanium is biocompatible, meaning that it won't be rejected by the human body. This property makes titanium perfect for use in surgical implants like hip replacements, or pins for setting bones, which can stay in the human body for roughly 20 years.