Brenda Frese's squad tallied 22 assists on 42 made shots.
The Terps won 104-84 over Iowa after reaching their seventh championship game in a row.
The Terps scored the most points in the title game's history.
Masonius dished a career-high eight assists against Minnesota, most of which came while playing in the post.
Diamond Miller and Ashley Owusu each scored 20 points to lead the Terps.
Alaysia Styles, a graduate transfer from Cal, impressed coming off the bench in her home debut.
The transfer recruits bring experience and offensive power to the Maryland women’s team.
Styles is the Terps' fourth new addition of the offseason.