Quote: (Hena @ 13 Aug. 2009, 18:41 )
Fluff says that AMTL turned traitors at Horus' time. I'm pretty sure that the titans not very current any more. Chaos does have tendency to warp things. Besides it would make more interesting list that way.
Some did, yes, but there's no reason to suppose that every legion has remained pure ever since, being as Space Marines and Guardsmen have happily continued to turn traitor ever since at a pretty steady rate.
Also note that Titans from the Heresy (Legio Vulcanum I) appear in Imperial Armour VI, and although their crews are now fused with their Titans, and the Titans themselves tend to bleed when shot, the Titans' weapons are all the same as their Imperial counterparts.
There are even rules for Chaos Warhounds and Chaos Reavers in the Imperial Armour books, and although they have some Chaotic upgrades, their weapons are all the same as their loyalist counterparts. Even the weapons they haven't made yet (from which we can infer that they had the chance to make an entirely new weapon set as the models aren't even sculpted yet, and decided quite firmly that the Chaotic Titans had the same weapons as their imperial counterparts).
So it is clear that the majority of Chaos Titans carry the same weapons as their Imperial counterparts, and it is a rare exception for Chaos Titans to carry 'unique' weapons.