Trinity saw off Monkstown 2-1 in a winner-takes-all decider, meaning they won Leinster Division 1 without losing a game.
Greg Arrowsmith and Daniel O'Donovan were on target as Trinity produced a resilient performance and claimed a deserved 2-1 win.
A second-half comeback from Templeogue meant both sides left disappointed after a 2-2 draw.
DU Fencing's season continues to go from strength to strength, with seven medals – including four golds – in the Student Individual Competition.
Trinity were pipped 12-10 by MU Barnhall yesterday in the final of Leinster League's Division 3.
DUFC claimed a huge scalp on Saturday, moving one step closer to the AIL semi-finals with a 37-13 defeat of league leaders Cork Con.
Despite a potential comeback at the beginning of the second half, Trinity were unable to handle Inchicore's attacking prowess.
Trinity students Caitriona Horan and Ellie O'Gorman are in a provisional 35-player squad to take on the UK in April.
After withstanding continual pressure for much of the game, DUAFC edged out table-toppers Lucan FC thanks to a late penalty from Ronan Hanaphy.
Clontarf's attacking prowess was too much for DUHC in what was a big game for two teams vying for promotion.