First, under Expert workspace, Transitions Tab, find your transition's thumbnail, right click it, and select "Set Selected As Default Transition".
Then go back to your text files on the Timeline, highlight them all at the same time, go to Timeline Menu/and click on Apply Default Transition. Job done.
(Note: To select Timeline titles on Video 2, draw a rectangle around them with the mouse cursor in order to select them.)
Please let us know if that targeted your question and if that worked for you. If not, please more details.