When (current) suspension was in its youth some claimed that the stretcher Ti skewers would allow more movement between the two sides of the frame/fork. As in more wheel twisting off plane. I only dabbled with suspension and even then with steel "internal cam" skewers I felt the front wheel moving about (brake pad rub being the audio part).

The vast majority of TI skewer users that I have serviced were on road bikes that with their far better braced wheel locations that seem to work just fine.

So, my take is that, when properly used, a Ti skewer is safe. I will say that most all the Ti skewers I have seen are of the lousy external can design, a type I refuse to use myself. Having said that I don't see the advantage in the Ti aspect of skewers and use "quality name" steel skewers of internal cam design on all my bikes (excepting the SA AW equipped bike and my Monty). Andy