And there was no respite for the Ulster side after the restart as Galway sub Jack Carr blasted a second-half hat-trick after the sides had turned around with Galway leading 3-14 to 0-8.
Carr was introduced at half-time after Shane Maloney and Jonathan Glynn had run riot.
Instead Carr volleyed his first to the net in the 35th minute, fired a ground stroke past Padraig Nugent five minutes later for his second, and completed his six-minute hat-trick with a deft flick past the hapless Antrim keeper.
Scorers for Galway: J Carr (3-2); S Maloney (1-4, 1f, 1’65); K Cullinane (0-6); A Tuohy (0-5); B Lane (1-2); J Flynn (1-2); J Glynn (1-1); S Caulfield (1-0); D Higgins (0-1); P Flaherty (0-1); M Mullins (0-1); B Keane (0-1).
Scorers for Antrim: D McCloskey (0-6, 5fs); C Johnson (0-3); J McGreevey (0-1); M Bradley (0-1); N McKenna (0-1).
GALWAY: S Mannion; P Mannion, P Killeen, C Diviney; J Hansberry, S Sweeney, D Burke; D Higgins, P Flaherty; J Flynn, J Glynn, A Tuohy; B Lane, S Maloney, K Cullinane.
Subs: O Teagle for Burke, inj, 30; J Carr for Maloney, h-t; M Mullins for Glynn, h-t; S Caulfield for Flaherty, 45; B Keane for Lane, 49.
ANTRIM: P Nugent; S Rooney, F Donnelly, L Peden; A McKinley, C Johnson, N McFadden; Stephen McAfee, M Bradley; Sean McAfee, J McGreevey, C Jennings; D McKernan, D McCloskey, C Johnson.
Subs: E Haggerty for Peden, 17; D Delargy forcKernan, 27; P Blaney for McKinley, 40; M Dudley for Jennings, 43; N McKenna for Sean McAfee, 43.
Referee: S Whelan (Wexford).