Australia 142 for 5 (Healy 46, Lanning 31, Haynes 25*) beat West Indies 71 (Taylor 16, Perry 2-2, Gardner 2-15, Kimmince 2-17) by 71 runs
They vaulted into their fifth final, giving themselves a shot at a fourth title with a performance of a side with a demonstrated history of rising at crunch moments. West Indies' hopes of a home final to do an encore of Kolkata 2016 went up in flames less than halfway into their chase of 143 on a sluggish surface where taking pace off the ball was vital.
Stafanie Taylor's 16 was the highest score in a sorry batting performance, with the hosts crumbling in the face of sustained pressure exerted with the new ball by Ellyse Perry, who now sits on 99 T20I wickets. Her two wickets in two overs pretty much sealed the game for Australia even before the Powerplay finished.
Deandra Dottin was done in by Perry's sharp inducker that had her chop on to flatten the leg stump, while the second strike of Shemaine Campbelle, who pulled a short delivery straight to Sophie Molineux at square leg in the fifth over, left West Indies trembling at 25 for 3. After that, it all went downhill rather quickly; West Indies paying the price for misreading the pitch and bowling first.
That Australia were able to take advantage of this debatable tactical call was down to Alyssa Healy's brilliance again. Having missed the final group game against India after a concussion scare, she slotted back in at the top of the order and offset any threat West Indies may have posed with her typically robust approach.
Her 38-ball 46 gave Australia not just the legs for a big total, but also exhibited a lesson for the other batsmen to emulate. Her batting towered over the rest on the night, and she walked away with her fourth Player-of-the-Match award in the tournament.
Healy was superbly complemented by Lanning, a fierce ball-striker herself, with a slightly contrasting approach, but one that worked nonetheless. Where Healy was gung-ho and fearless, Lanning was calculative and industrious. Both batsmen made a conscious effort to score runs off the seam bowlers, perhaps knowing well targeting spin later could prove challenging.
West Indies conceded just four boundaries in the first 10 overs, and even manufactured two opportunities off Lanning, who first survived a close stumping chance followed by a run-out - only to be saved by an inch - in the ninth over. Healy's back-to-back boundaries off legspinner Afy Fletcher in the 12th over marked the start of Australia's acceleration.
This tactic didn't backfire even though they lost a couple of wickets, and it was largely down to Taylor's miscalculation. Where spin was key, she persisted with her seamers and paid the price. Dottin, who was seen hobbling, conceded 23 runs in two overs. This included a 17-run penultimate over, where Rachel Haynes picked her for three boundaries, to swing momentum in Australia's favour.
West Indies needed to get themselves ahead of the asking rate in the Powerplay to have any chance, but that was nipped in the bud by Healy, who wasn't done just yet. Hayley Matthews wandered outside the crease in trying to defend a ball in the second over only to see Healy collect the ball and break the bails to catch her well short.
Five balls later, Perry dismissed Dottin to trigger the procession. On a surface where the spinners thrived, Perry delivered two pressure-inducing overs and struck twice. It was all down to Taylor from there on to pull off a coup with a lower order that has been far too inconsistent this tournament. This was a task too steep against a determined side keen to shake-off a minor blip.