As visible in the temperature and pressure profile on the last page, the conditions in the gas turbine vary widely. Different materials are therefore chose for different parts, as illustrated below:

The different materials used in a Rolls-Royce jet engine. In blue, titanium is ideal for its strength and density, but not at high temperatures, where it is replaced by nickel-based superalloys (red). In orange: steel used for the static parts of the compressor. Image courtesy Michael Cervenka, Rolls-Royce

In this case, 'low temperature' blades are made of titanium alloys, while high temperature components use Ni-base superalloys. The most severe conditions are met in the first row of the turbine. The entry temperature is around 1400 ^oC. Temperatures are kept lower at the surface of the blade because of the cooling system (ceramic surface approaching 1100 ^oC), and the thermal coat takes another 1-200 ^oC leading to a metal temperature in the vicinity of 930 ^oC.