Aesir

There are two presumed types of titan, the stronger, smarter, more agile Aesir, and the tougher but less powerful Vanir. The Aesir are platinum-skinned giants that once crafted the oceans and skies. Their sphere of power is storm, frost and water. They are highly reclusive, shying away from all mortal creatures, not wanting to disrupt the delicate balance of their evolution. Their direct children are the mountain and sea giants, whom they created to help them tend to the high peaks and oceans of the world. They have a connection to the elements of Air and Water.

Tribunal of Ages
Following the imprisonment of the Old Gods, Aesir were appointed as protectors on Azeroth. Aesir, in common nomenclator is "Storm Giants." There was at some point global combat between the Aesir and the Vanir because of something related to Loken. Loken neutralized all remaining Aesir and Vanir affecting the termination of the conflict.

Known Aesir

 * Aman'Thul
 * Golganneth
 * Norgannon

Storm giants?
It should be noted that with the revelation that the translation of Aesir is "Storm Giant," the question of whether storm giants (such as Gymer and his Storm Giants) are Aesir as well arises (or if the Tribunal of Ages was actually talking about Gymer's race). It is unlikely that two titanic things would share a name arbitrarily. It is possible that Aesir is not a type of titan, but a descriptive label applied to a type of titan. It is also possible that the storm giants are lesser titans in some form. The flesh and blood storm giants may be Aesir that succumbed to the Curse of Flesh, but there is little evidence either way. It is possible that mountain giants and sea giants are Aesir as well, be they titans or not. However, being made of stone, mountain giants would be closer to Vanir.

Myth
The Æsir (also spelled Aesir) are one of the two pantheons of gods in Norse mythology, the other being the Vanir. Famous/well known Æsir Gods include Odin and Thor.