Not necessarily.
There are different guilds. Some are geared towards hardcore progress, some towards more casual play. Also, it is not necessarily so that his titan residuum is less of a benefit to the group than someone's minor item upgrade. It might be the other way around.
Also, we are in the personal loot world now. So unless specified, asked, and agreed by the raiders on another system - all loot you get is yours and no one is entitled to it.