The world number six hit 25 winners in the match to sweep aside his Kazakh opponent and set up a final with top-seeded Australian, Alex de Minaur.
"It's tough to not be satisfied," said Auger-Aliassime, who was unplayable at times.
"I was striking the ball well from the beginning, and I never looked back, so it was a great match," added the 25-year-old.
The Canadian raced off to a flying start, breaking Bublik's first service game with a combination of fierce groundstrokes and stubborn defence.
A Bublik double fault and netted forehand gifted Auger-Aliassime another break in the sixth game, leaving him to serve for the set at 5-1 up.
Auger-Aliassime wrapped up the first set in just 25 minutes, finishing with his second ace to cap a near-flawless set of tennis, with 13 winners and just six errors.
The second set started more competitively, going on serve until Auger-Aliassime grasped the initiative in the fifth game, pouncing on an ill-judged drop shot to break Bublik.
Bublik was reduced to trying a playful underarm serve in his next service game, delighting the Rotterdam crowd, but he was again broken, and Auger-Aliassime served for the match.
At match point, the Kazakh player dumped a lame backhand into the bottom of the net to gift Auger-Aliassime the contest and a chance to claim his second title in Rotterdam.
The Canadian will face De Minaur in Sunday's showpiece after the Australian beat Ugo Humbert 6-3, 6-4.