I don't see solid defense or offensive use of Ti.
I know when I have been asked or feel backed into a corner where I have to explain my motivations in order to clear a situation up or I *care* about doing so I am both defensive and offensive at the same time. Kind of like punching someone in the face while asking them to stop hurting you. It's really uncomfortable for the exact and excellent point Poki made in that last sentence.
Ti explained is Ti displayed.
If you have several Ti reasons you can choose different paths to take. So Ti explained still has a way of hiding, but yes it can be like punching them while asking them to stop hurting. It really sucks in this manner.