Laurin Mincy and Brene Moseley added 15 apiece as the top-seed Terrapins (29-2) face second-seed Iowa or third-seeded Ohio State in Sunday's title game.
Nia Coffey had a game-high 23 points before fouling out while Alex Cohen added 12 for the fourth seed Wildcats (23-8).
Coffey had 14 points as Northwestern opened an early 23-12 lead while Maryland managed just 5-for-18 (25 percent from the field) in the same span.
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