Steel titan

Steel titans are level 99 Summoning familiars, introduced with the "Summoning 2" update on the 31 March 2008. It is currently the most powerful familiar and, with 750, is in fourth place for the highest hitpoints of any creature in RuneScape after the Corporeal Beast with 2000 while the Avatar of Creation and the Avatar of Destruction in Soul Wars tie for second with 1000.

Steel titans are able to deal a maximum of 25 damage. With the Steel of Legends special move, it can deal up to 96 total damage (by hitting 4 consecutive 24s), possibly killing a player in one blow. Due to this effectiveness, they are commonly used by level 99 summoners fighting in the Duel Arena. Using Ruby bolts (e) on a Steel titan will allow the titan to be hit by a maximum of 150 damage in a single blow, the highest hit in the game  not involving part of a quest or minigame.

Steel titans provide an invisible 15% boost to the summoner's melee defences.

Steel titan pouch
Steel titan pouch is made by using a Summoning pouch on a Summoning obelisk with 178 spirit shards, a Crimson charm and a steel platebody in the inventory. Making the pouch earns 435.2 experience points. Using the pouch to summon a Steel titan gains 4.9 experience points, and costs 10 Summoning points.

Steel of legends scroll
Steel of legends scroll enables the use of the Steel of Legends special move for a Steel titan. Using the pouch on a Summoning obelisk creates 10 scrolls.

Steel of Legends
Steel of Legends is the special move for the steel titan, which inflicts four ranged attacks instead of one in the next attack. This attack may be used five times in a row with the required number of scrolls.

Trivia
Its body resembles that of the super battle droid from Star Wars.