Laurin Mincy scored 27 points and top-seeded
The Terrapins (32-2) will take a 26-game winning streak into a matchup with Duke (23-10) in a Sweet 16 game Saturday at Spokane, Wash.
The Terrapins used a 17-2 run immediately after halftime to pull away.
Lexie Brown scored 23 points for the Terrapins.
Eighth-seeded Princeton (31-1) was coming off the program's first victory in an NCAA tournament.
In the Albany Regional:
In the Greensboro Regional: