Originally Posted by
Grocalis
Tyr was created to help watch over Ulduar. It is made clear in WOTLK that the Watchers are not designed to leave the areas of Ulduar for any reason. The fact Tyr is wandering around in areas outside Ulduar means either the Titans are pretty lax about it, or they are not around to scold him for over-reaching his influence.
Because as we have seen many times before, the Titans utilize "super-tech". If they suddenly came across something that likely obliterated them, they would send out messages to be intercepted by all computer systems on past worlds. A space S.O.S if you will. Since we are right now in Pandaria during this time, Wrathion gets bombarded with the message while playing around with the Thunder Forge, which is Titan tech. I am sure such a message could have also been picked up by the Forge of Wills or the Tribunal of Ages in Ulduar, but since that is a different continent we are no longer taking part, we will likely not see anything come of it.
P.S. I wish to reiterate. The WC3 manual implies that the Titans don't know about Sargeras and the Burning Legion. Later on the RPG did in fact say they knew about the Burning Legion, but such sources were later made NON-CANON by Blizzard. Until we find a new source implying they know about the Burning Legion, the WC3 manual is really all we have. To help refresh people, here is the relevant quotes.
"Apparently unaware of Sargeras’ mission to undo their myriad works, the Titans continued to move from world to world, shaping and ordering them as they saw fit."
Until new lore comes to light showing that the Titans knew about the Burning Legion and were just, for the most part, ignoring them, it makes more sense to play off them being ignorant.