The big reason for this cycle on Titan is that at a given pressure ratio, the necessary absolute temperature in the hot part of the engine is proportional to th

The big reason for this cycle on Titan is that at a given pressure ratio, the necessary absolute temperature in the hot part of the engine is proportional to the absolute inlet temperature. So, if the absolute inlet temperature is 1/3rd that of Earth's atmosphere, the peak temperature is also drastically reduced. All the hot parts could be made from cheap materials. The turbine blades wouldn't have to be cooled. Lower temperature also reduces the speed of sound in the gases, which reduces the velocity (and therefore stress) of the compressor and turbine blades.