Same issue here.
Try reducing the textures in the game from high to medium.
This worked for me.
I ran into this suggestion at the creative forums.
I was only able to usually play 1 titian map (maybe 2 in rare cases). After that I would get the same crash during map loading.
After changing my textures to medium I have played up to 5 titan maps in a row many times with no problems. Perhaps the issue is still there but takes much longer to hit now.
Good luck.