The concept of the Titan itself I haven't finalized yet, but broadly speaking, its outer shell will be an ovoid or an oblate spheroid, with many holes in its surface and a wide open central core. The spheroid will have several gigantic "spires" extending and curving above and below the central space.
The superweapon itself will be represented (at least I hope I will manage to pull it off) with several "stages":
-initially a small central swirl with particles dropping from various points on the spires and falling into the central vortex
-second stage will look like an expanded vortex sucking in more particles. A subtle light flare will emerge coupled with glowing gasses escaping the forming singularity event horizon
-third stage will have massive electric surges striking the central vortex from the spires, and a large maelstrom will form in the middle with bright rays of light escaping
And then ka-boom! A huge gravity shockwave will sweep over the entire sector, mowing ships, stations and everything unlucky enough not to have the Xin shield generators which can nulify the gravity impact on their ships, leaving them intact amidst the wreckage of their enemies.
In other news, I'm going for a little trip these days, but I have taken some time this morning to put together a little "wallpaper-like" image featuring the newest ship in the fleet, the mighty Xin Tyrant, a full-fledged battleship.

Enjoy!