Adelaide will take on the winner of the Elimination Final between Western Bulldogs and Collingwood after going down to Melbourne by 21 points on Friday night.
The Crows fell to the Demons in their Qualifying Final, 7.6 (48) to 4.3 (27) at IKON Park.
Adelaide earned the double chance after finishing the minor round third and will play in a Semi-Final next weekend.
Just as they did in last season's Grand Final, the Crows got the jump, however the Demons slowly but surely worked their way back into the match.
Melbourne hadn't conceded a score in the first quarter for its past four matches, but that was quickly forgotten when Danielle Ponter booted a goal in the first 19 seconds (the fastest start in AFLW history), followed by Caitlin Gould three minutes later.
The Demons almost looked to be a player short in their handball chains, the Crows – smartly playing a one-on-one defence – always managing to get a hand in there at the vital moment.
Sarah Allan had barely put a foot wrong in the first quarter and a half, but Liv Purcell's snap bounced just centimetres above her hand for Melbourne's first goal, before a rare Sarah Lampard major just minutes later got the Dees within touching distance.
Despite their fiery start, it was a scoreless second term for the Crows as the Dees righted the ship, getting better bang for its buck in its run out of defence as the match wore on.
Midfielders Ebony Marinoff (17 disposals, 12 tackles) and Anne Hatchard (16 touches, eight tackles) fought hard for the Crows.
MELBOURNE 0.2 3.4 4.6 7.6 (48)
ADELAIDE 3.2 3.2 4.2 4.3 (27)
GOALS
Melbourne: Lampard 2, Bannan 2, Purcell, L. Pearce, Zanker
Adelaide: Gould 2, Ponter, Woodland
BEST
Melbourne: Purcell, Lampard, Bannan, Mithen, Hanks, Harris
Adelaide: Marinoff, Allan, Gould, Ponter, Hatchard
INJURIES
Melbourne: Nil
Adelaide: Randall (head knock)
Reports: Nil
