The Black Knight Titan is a giant that is encountered during the Holy Grailquest. He will prevent players from passing the bridge in the Fisher Realm until Sir Percival becomes the new king, and as such is immobile. A halberd can also be used from two squares away to melee him without taking damage. A simple tactic to defeat him is to use poison to lower its life points before killing it in close combat. If the last blow dealt to him is not done with Excalibur, he regenerates all his life points and players must kill him again.
The Black Knight Titan can be fought multiple times, and must be defeated in order to pass. When Sir Percival becomes king, the Black Knight Titan can no longer be fought. When he is killed, a message appears that says: "Well done, you have defeated the Black Knight Titan!"
The Black Knight Titan is fightable as a class E boss monster in the Dominion Tower minigame if the player has completed Holy Grail. In the tower, the titan can be slain without using or needing Excalibur.
He is based on the black knight from "Monty Python and the Holy Grail" who guards a bridge.
The Black Knight Titan does not drop Big Bones, despite its classification as a Giant.
The Black Knight Titan is currently one of the few monsters not to have received a graphical update since the release of RuneScape 2.
Due to the Black Knight Titan using the old graphics, it has turned into an inside-joke among Jagex and the community, with Jagex moderators being on the side of not updating the Black Knight Titan's graphics.