Alternative way for truing disc brake rotor after a couple of truing procedures 2 days ago after the last ride my front rotor (Ashima AiRotor 203mm) twisted again in a small area on it (not hit in obstacle or overheated), I was almost ready to throw another half an hour from my life to manual truing it with the tool, but gave up and decided to ask the community what is the idea to true it with best results and doesn't last 4-5 rides before twist again. Note that the brake caliper is centered so there's almost a symmetrical gaps between the rotor and brake pads and both brake pistons go out also symmetrically. Is it worth it to remove the rotor from the hub, heat it to mineral oil's boiling temp and put it on a press with 2-3t pressure or put it on lathe and use a pushing rollers on 1/3 of it's braking surface, like in machines which straightens the steel wire?

Thanks in advance
Your best and safest option is to replace the rotor with a new one.

Bend metal enough and it will deform permanently.  

In addition, rotors do wear away slowly over time.  There's a chance yours is getting thinner, and more vulnerable to bending.   Generally they're ~2 mm thick when new and unservicable at 1.6 mm thick.

Finally, if your rotor has overheated at any time (IE its blue or rainbow-coloured) then the rotor has also been weakened and is vulnerable to bending and warping.

Brake systems are the one part on which you don't want to cheap-out.