Absolutely agree. The burn cage might by a titanium alloy, the impeller rings are made from single crystal nickel alloy. But the bottom line is the burning temp of jet fuel is well below the melting point of the metals

Fun fact, iron has a crystalline structure of Body Centered Cubic, but changes to Face Centered Cubic as it heats to 912°C. In other words iron expands normally until it hits an allotropic state at which it shrinks by about 20%. That’s what forces the bend