That what my thought on Ti. My impression is that it iis dent resistent for the most part, but when a piece is left in an area that it has to flex, say at an edge of a table, it will flex with time and hold the shape that its been flexed.
I don't think its a good idea to use TI in engine internals inless its been cryo (sp?) treated, and even then the effect of said process is only temporary dure to the heat tha it would be seeing.