[Arkcon]

Several things are documented in the individual AI_Anger.txt files. I haven't read them extensively -- I like a little wonder. But here's something: The AI get more angry when you destroy it's ships in combat, and also when it destroys yours (it's winning after all, might as well press the advantage). So if you're playing tactical combat, just don't blow up the ships. If you're using strategic combat, use shield depleters and engine destroyers. As the AI starts losing income, it soon sues for peace.