Sam Mitchell starred through the midfield and Cyril Rioli booted two opportunistic goals in the final term to secure the victory.
The result ends any hopes of a western derby grand final, with Hawthorn to meet either West Coast or North Melbourne in the premiership decider.
It also means Dockers forward Matthew Pavlich is set to bow out without a flag to his name.
Pavlich, a veteran of 335 games, is widely tipped to announce his retirement in the coming weeks, with injury-prone defender Luke McPharlin set to join him.
Star Fremantle midfielder Nat Fyfe was on the field for just one minute before re-injuring his troublesome left leg.
Fyfe was a sight for sore eyes as he limped his way through the first half.
Although he moved better after the long break, his output was clearly impacted, finishing with 24 disposals.
His injury allowed Hawthorn to take control of the midfield battle.
Mitchell finished with 35 disposals, while Taylor Duryea was also crucial, with his pin-point kicking setting up numerous attacking opportunities.
But it was the Rioli show when the game was there to be won in the final quarter.
With his side leading by just nine points and looking vulnerable, Rioli swooped on a loose ball and kicked truly after young Docker Tom Sheridan dropped a sitter.
Then when Cameron Sutcliffe's dangerous kick across goal was spoiled, Rioli was on hand again to snap his second.
The double blow broke Fremantle's spirit, with goals to Duryea and Jarryd Roughead shortly after killing the contest.
Hawthorn skipper Luke Hodge suffered a big knock midway through the final term, but he was able to return to the field.
Dockers' strong start quickly turns sourFremantle made a dream start to the match with two quick goals and that was before Fyfe had even stepped out onto the field.
Fyfe, nursing inflammation in his left leg, received a huge cheer when he trotted out at the four-minute mark, but disaster struck just one minute later when Fyfe's legs got in the way of a rampaging Brian Lake.
Fyfe was clearly hurt by the collision and he spent the rest of the quarter limping from contest to contest at half pace.
It took almost 20 minutes for Fyfe to tally his first disposal as Hawthorn wrested momentum away from Fremantle to enter the first break with a handy 19-point lead.
Fremantle coach Ross Lyon let rip at the quarter-time break.
Goalsneak Hayden Ballantyne, whose off-the-ball bump cost the Dockers a goal, was on the receiving end of a big spray and Michael Johnson also copped a bake.
Hawthorn's lead ballooned to 25 points when Ryan Schoenmakers was on target early in the second term.
And with Fyfe horribly out of sorts and battling along on one leg, it seemed Hawthorn would race away.
But the Dockers stuck to the task to work their way back into the contest.
Fyfe eventually came good with 11 disposals in the second term, helping trim the deficit to 16 points at half-time.
The third quarter became an arm wrestle.
Fremantle looked gone when Hawthorn skipped out to a 28-point lead, but the margin was reduced to 11 when ruckman Jon Griffin unleashed a 55-metre bomb late in the third term but a trip by Fyfe gave Matt Suckling a shot from outside 50 after the siren.
He appeared to run off his line slightly as he slotted his second major, but the goal stood and the premiers took a telling 17-point lead into the final term before powering home.