The Anteaters (24-8 overall, 17-3 Big West) had already clinched the regular-season title and the No. 1 seed for the conference tournament, and their 81-71 win keeps the Titans out of the eight-team field. UCI plays in a semifinal next Friday at 6 p.m.
The Titans see another double-digit second-half lead cut to a one-possession game late, but they hold on for a 54-51 road win and improve to 3-5 in Big West Conference play.
Max Jones scores 22 points and DJ Brewton has 20 as the Titans see their 15-point second-half lead whittled to two in the final minute before holding off the Gauchos, 73-69.
The Titans led for much of the second half and were ahead by one point with 1:24 left, but the Aggies made a few more free throws to close out a 67-65 win. Fullerton is 8-10 overall and 1-5 in Big West play.