The title was UTA's first since 2006 as the Mavs won a program-record 18 matches.
UT Arlington ended the season 18-11 and with the most wins in program history.
UTA and Oklahoma meet for the first time since 2008 in the NCAA Tournament's first round.
UT Arlington has found dependable points in freshmen Guanarteme Nuez and Mauricio Del Rio this season.
UTA's championship is the first for the Mavericks since winning in the Southland Conference in 2006.