Tito Ortiz wants Chuck Liddell to hang it up for good -- saying he doesn't want to give The Iceman a rematch after last weekend's beatdown and feels bad for digging a pretend grave in the cage.
Tito wrecked Chuck's face in a brutal 1st-round knockout Saturday ... and says it became crystal clear to him that 48-year-old Liddell needs to stop fighting already.
"Physically, I don't think he should [fight again]", Ortiz says ... "I’m not even going to say I will fight him again, because I don’t think he should.