Star Heat opener Grace Harris pummelled 54 off 33 balls to lift the visitors to a formidable 5-197 in Wednesday night's preliminary final.
Charli Knott (32no off 14), Amelia Kerr (31 off 23) and Laura Harris (24 off 11) chipped in with handy scores as the Heat posted the biggest ever total in a WBBL finals match.
In reply, the Scorchers were restricted to 8-130 in front of 2226 fans, with only Natalie Sciver-Brunt (36 off 27) posting any score of note as the Heat comfortably booked a date in Saturday's showdown.
Georgia Voll (r) took 4-19 for the Brisbane Heat against the Perth Scorchers. (Richard Wainwright/AAP PHOTOS)
Heat spinner Georgia Voll snared career-best figures of 4-19 from her four overs in a standout display, while Jess Jonassen (2-25) and Nicola Hancock (1-17 off four overs) were also crucial.
The Strikers earned direct entry to the grand final - plus hosting rights at Adelaide Oval - after finishing three games clear on top of the ladder.
But the Heat loom as dangerous opponents after thumping both the Sydney Thunder and Perth Scorchers in consecutive cut-throat finals at the WACA.
The Scorchers were left to rue a season in which they lost their last four games to crash out of title contention.
"T20 cricket is brutal," spinner Alana King said.
"It's your best friend and then it can be your worst enemy as well.
"I'm sure all the reviews will happen in due course. But I think tonight we'll just enjoy each other's company.
"We were back in finals and that was a big tick for us."
Harris got the party started with 10 fours and a six, needing just 26 balls to post her half-century.
Her Heat teammates joined in on the fun after her dismissal.
Scorchers star Sophie Devine copped the most pain with figures of 0-41 from her three overs while Amy Edgar (0-35 off three) and Chloe Ainsworth (0-25 off two) were also thrashed.
King (3-30 off four overs) was the most dangerous and economical bowler.
Jess Jonassen gets Beth Mooney. What a massive moment in this final — cricket.com.au (@cricketcomau) #WBBL09 pic.twitter.com/fBVv9jUDwUNovember 29, 2023
The Scorchers' run chase never truly got going.
Openers Beth Mooney (18) and Lauren Winfield-Hill (15) failed to make the most of their solid starts.
And when Devine (13) skied Voll to hand wicketkeeper Georgia Redmayne an easy catch, the Scorchers were 4-62 with the required run rate spiralling out of control.
Sciver-Brunt kept the Scorchers within striking distance, but all hope was lost when she was trapped LBW by Jonassen with Perth still needing 135 more runs off 71 balls.
Voll was superb throughout, with Chloe Piparo, Maddy Darke and Devine among her victims.
"It's pretty special. I haven't taken a lot of wickets during the season," Voll said.
"I've been more of that economical bowler, and I've enjoyed that role and it hasnt really bothered me.
"But it's nice to get rewarded. If you bowl in the right places long enough, you're bound to get a bit of success at some point."
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