Courtney Cranston had 10 points and 10 rebounds to lead the Titans to a nonleague home win.
Katharine Williams led all scorers with 13 points and had six steals for Union.
The Titans put on a full-court press in the second half, in which they outscored Mountain View 31-9.
UNION 48, MOUNTAIN VIEW (Ore.) 25
MTN. VIEW — Scrocca 0, Vanderzwip 4, Miesner 3, Reinwald 8, Webber 3, Goetz 3, Hughes 4. Totals 7 (0) 11-16 25.
UNION — Mailia Aguigui 5, Grace Davis , Sarah Garrison , Michelle Chin 0, Katharine Williams 13, Courtney Cranston 10, Kili Anderson 8, Abby Forsyth 2, Sarah Trostle 7, Emily Takayoshi 3, Avery Hoyt 0. Totals 19 (2) 8-16 48.
Mtn. View 8 8 5 4—25
Union 6 11 18 13—48
JV — Union won.
C— Mountain View won.