FYI
That big titan took on 32 leman russes, 7 baneblades (of varying chassis, at least 2 of them were the volcano cannon type) and about 12,000 pts Blood angels and it still won with about 6 structure points to spare.
It puts out 27 Str D Templates of varying size a round. Its *not* easy to kill. I've only killed it once and that was with my eldar force that combined puts out 22 Str D shots a turn and only after I took out all of its 15 void shields with a shadow walker formation with scatter lasers.
You underestimate it at your own peril. And usually while you're focused on killing it, the rest of the damn army is pounding you into submission.