I’ve done this two different ways.
After all my titles scroll through using Boris Title Crawl, I switch to Boris title 3d for the text I want to remain on the screen. Then keyframe the motion so the text scrolls in and then stops.
The other option is the Percent Completion slider at the bottom of the Control tab for Boris Title Crawl. You start by putting a keyframe at 0 percent and then move the playhead to where you want the roll to stop. Put a keyframe there and then adjust the percent completion slider so your text is at the position you want.
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if all else fails
edit in PRO RES 422