Everything I read from forums and from wire sellers said the same, but they are wrong, in two ways:
Firstly, titanium dioxide does not form unless the coil is glowed very hot. Titanium takes only a bit less heat to be ruined by dry firing than 316L SS does. Temperatures during vaping are much, much lower than that of course
Secondly, titanium dioxide has Never been found to increase the risk of cancer in humans. This was the most interesting part of my research. From two studies done on rats (with methods that are now considered inhumane), the rats experienced lung overload from Ti dioxide - they basically breathed nothing but the powder, in other words. They got cancer, yeah - at levels no human has ever experienced and certainly would not from even taking a big super nasty dry hit of unwicked Titanium wire. Titanium dioxide was labeled as a Group 2b carcinogen, which means "possibly carcinogenic to humans." Which is less worrisome than "probably carcinogenic" 2A which is still below Group 1 "known carcinogen"
Radiofrequency waves are also a Group 2b carcinogen - I'd get cancer from holding a cellphone up to my head or from all the radio I listen to first, yeah?
Tl:dr - danger of vaping Ti wire without temperature control mode is comparable to using a cell phone, and I am a nerd who reads research papers for fun