The Terps outshot the Dukes 24-3 as they picked up their first home win since Sept. 21.
Tornetta was announced as a transfer for the Terps on May 28.
The Terps snapped a three-game losing streak and entered the Big Ten tournament on a high note.
The goal lifted the Terps to a weekend sweep of the Scarlet Knights.
Despite outshooting the Wolverines 13-6, the Terps couldn't find a goal.
Wolverines goalkeeper Anna Spieker made five saves.
Bibi Donraat scored the winner in the 58th minute.
Barraco made seven saves for the Nittany Lions as the Terps dropped their second straight game.
The Terps didn't reach the national title game for the first time since 2016.
“She did her time as a redshirt. She’s now got the groove, and she knows what it takes.”