Defence against torpedo boats was provided by fourteen QF 14-pounder Mk II guns, but the guns were modified in British service to use the standard shell used by the QF 12 pounder 18 cwt gun in British service. They fired , 12.5-lb projectiles at a muzzle velocity of . Their maximum range and rate of fire is unknown. 200 rounds per gun was carried by "Triumph". The ship also mounted four QF 6-pounder Hotchkiss guns in the fighting tops, although these were removed in 1906–08.