Originally Posted by 2011 Nismo#91

For refrence, found this from some metal workers.

Heat tinting of titanium:
pale gold straw- 385C : 725F
purple- 412C : 774F
deep blue- 440C : 824F
red purple- 565C : 1049F
brown gray- 648C : 1198F
green blue-925C : 1697F

Yeah you needs some cooling, also make sure any rubber parts aren't too damaged like the caliper dust boots.