Jois was 10 of 14 from the field. Justin Crosgile also posted a double-double with 16 points and 10 rebounds. He was 4 of 8 from 3-point range.
Thomas Reuter scored 16 points, and Parker Kelly added 12 for the Eagles (2-5).
Though the Eagles had 19 turnovers, they shot 45.6 percent from the field for the game. The Titans shot 38 percent from the field for the game.
The Titans (3-3) led 46-39 at halftime in a game with 10 ties and eight lead changes.
Kwame Vaughn scored 22 points and D.J. Seeley scored 21 for the Titans. Sammy Yeager had nine rebounds.
The loss snapped Cal State Fullerton's three-game win streak.