To note something for you on talking about spreading the Titan research out to get the AI to research other subjects as well, the AI should prioritize all ship/structure unlocks and, subsequently, any prereqs for those.
The AI seems to take the following in priority order:
First capital ship
Remaining capital ship (any will do)
Access to a bombing frigate
Any other tech path that unlocks a ship
Any other tech that unlocks a structure (planet or starbase)
Any other tech that leads to an ability unlock
Any remaining tech
If a tech has a negative or 0 priority the AI will never select it.
Conversing with Delnar_Ersike the AI will also place the Capital ship constructor on the top of its build queue to the detriment of other activities. This would in part explain why Vorlon, Shadow and Minbari AI shutdown so frequently. If the AI gets lucky and hits on the combination to build the capital ship constructor then game on. Also, the AI will act wonky until it can build it's first capital ship. The following link has been quite insightful: https://forums.sinsofasolarempire.com/451274/page/5/#3479524
TobiWahn, based on what I'm learning we are going to have to redo the Vorlon, Shadow and Minbari early tech a little bit to correct recently identified AI priorities.