Welcome to the forum.
If it's just a static Title, click-drag on the Tail in the Timeline, and extend it, as desired. I like to have the Info Panel open, and visible, to see just what the Duration of the Title is.
You can also right click the title and select Time Stretch.. in the dialog box that comes you can adjust the duration, you can adjust the duration of anything on the timeline using this.
For videos and rolling titles, it also shows the percentage by which your speed will reduce