The top weight of 69kg and the testing conditions did not deter the Ellis Winsloe-trained 8yr-old in the 3900m feature.
Rider Stuart Higgins kept Tai Ho out of the early speed, before challenging the leaders in the back straight on the final lap.
Tai Ho surged to a lead of more than five lengths before the home turn, which was narrowed to a length and a-half at the finish by Delacroix.
Similar tactics paid off for rider James Seivwright, who rode The Energizer to win the Great Western Hurdles.
The rider patiently waited to unleash the Kelvin and Aimee Tyler-trained 8yr-old for his customary fast-finishing burst.
The tactic paid off when The Energizer produced a scintillating sprint to run down the favourite and leader, Banbury Lad, to win the 2500m feature by four lengths.
