Seventeen turnovers were a problem for the visitors on Sunday, who were also out-rebounded 31-26.
Auburn shot well enough to win. The Tigers hit 70 percent of their shots in the first half and 51.0 percent for the game while the Mocs, who improved to 4-3, hit 49.1 percent from the field.
Auburn's lead was five points with 13:58 left to play, but the home team went on a 15-2 run to take a 61-51 lead and the Tigers never seriously threatened down the stretch.
In the second half, Chattanooga hit 61.5 percent of its shots while the Tigers made 38.7 percent.
Auburn only got to the foul line four times and made each attempt. The Mocs made 13-17 free throws.
Senior guard Nitasha Brown led the Tigers in scoring with 18 points. She hit 8-17 field goals and 2-3 treys. However, she had six of her team's 17 turnovers.
Freshman guard Whitney Boddie added 15 points with five assists and two turnovers. Another freshman guard, DeWanna Bonner, scored nine points and added six rebounds.
Auburn's next leading scorer was reserve forward Alexis Ogubie, who scored six points and added six rebounds.
Chattanooga got 20 points from forward Tiffani Roberson, 18 from guard Nicole Mattison and 16 points and 14 rebounds from forward Alex Anderson.
The Tigers will return to action at home on Wednesday at 7 p.m. CST as Western Carolina comes to Beard-Eaves Memorial Coliseum.