|Quoting RichardPrice (Reply 1):|
Depends on what part of the engine. Some is titanium.
|Quoting HAWK21M (Reply 7):|
Turbine & high temperature sections can use Titanium alloy.
Fan cases can be aluminum alloy,Graphite Epoxy.
Kevlar Epoxy & other Fibreglass for other Areas depending on Temperature requirements.
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