The Terps outscored the Dukes 29-11 in the final frame.
Austin scored two points in 14 minutes against South Carolina.
Owusu posted team highs in points and rebounds.
The Terps shot 31.4 percent against the Gamecocks.
Both teams struggled offensively.
Faith Masonius, Diamond Miller and Ashley Owusu figure to be key pieces this season.
Seven Terps scored in double figures.
Reese chose the Terps over Syracuse, Tennessee and USC, among others.
As the start of the 2019-20 campaign nears, the Terps aim for a deep postseason run.
The senior has also been voted Big Ten Preseason Player of the Year by media and coaches.