All x-metals are made up of titanium alloy. Oakley then does them in different frame finishes... i.e. Carbon, polished, plasma, x-metal, brown, 24k... etc
TiO2 is one of the finishes, which is the name given to the 2 tone Juliet and XX which u see in this thread. Essentially, its plasma orbitals with x-metal bridge and ear stems.
Thanks for taking the time to explain that to me. It's starting to make sense.