Pre-sale: ReyLight Triple Ti Dawn 18650/18350 triple

You can try to get purple or pink if you grow the oxid layer with controlled heat.
Q: CRX FW3A, a TLF/BLF EDC flashlight - SST-20 available, coupon codes public - #498 by CRX (2017-05-23)

and here the voltage guide

Pink titanium flashlight should be 70V
Nice instructions: bob_titanium

I gues for the pattern they use a kind of stamp pressen on the body.

Some Acebeam Ti lights with pattern seem to had a resistive heat wire wrapped around.