The Titans missed two shots in the closing seconds that would have sent the game into overtime as Federal Way earned the sixth seed from the 4A bi-district tournament at Mount Tahoma High School.
Union (17-7) next gets a rematch against Curtis (19-6) of University Place at 8 p.m. Friday at Auburn High School for a berth to state at the Tacoma Dome.
Union lost to Curtis 59-51 in the opening game of the bi-district tournament on Friday.
The Titans made up a five-point deficit in the closing minutes against Federal Way. Tanner Nelson’s 3-pointer with 45 seconds to play pulled the Titans ahead 51-49.