Based on my own experience I haven't seen anymore leading, smoke etc. using Titegroup than other bullet/powder combinations I've tried.
I base that opinion on cleaning the barrel with an Outers Electrochemical bore cleaner then inspecting the barrel with a bore scope after shooting various polymer coated bullet/powder combinations.
Even went low tech and dug spent bullets out of the ground for inspection of the base etc.
I found the USPSA 2020 equipment survey results interesting. Titegroup took 2nd in the Limited class.
Titegroup was 1st in Production, PCC, Carry Optics, Single Stack and Revolver. Of course Titegroup is not suited for Open, the only other class.
Sport Pistol's web page states some powders "can" burn the polymer base. Sounds like it's possible but not for sure. Some coatings are Hi-Tek and some like Eggleston and Blue are proprietary.
Sport Pistol did make the survey results in a couple classes but at a rate less than half of the respondents that use Titegroup.
It would be interesting if there was method to determine the temp of Titegroup and other powders and see if there is a difference.