Curtis Youngren had a double-double with 10 points and 11 rebounds as the Titans rallied to improve their record to 12-0.
Ethan Smith and Brad Lackey had back-to-back 3-pointers in the fourth quarter to give Union the lead and help cement the win for Titans.
Smith led Union with 22 points, hitting four 3-pointers, Lackey added 10 points and Youngren also had five blocks for Union.
UNION 60, OLYMPIA 50
UNION (12-0) — Brad Lackey 10, Ariya Briscoe 0, Josh Reznick 4, Tanner Toolson 8, Alishawaun Taylor 6, Ethan Smith 22, Ty McCullum 0, Curtis Youngren 10. Totals 22 (8) 8-8 60.