Keep graphic and transition visible only in defined window?

I created a title in PSD.  The video transition is reverse push, creating the effect of the title sliding Right to Left. 

I don't want the title to be visible until after it is past the right 1/3rd of the screen.

• The right 1/3 of the screen is heavily key framed GoPro helmet cams.  It is on video track 1. 
• The left 2/3 of the screen is normal video clips with little or no effects or key frames, it is on video track 6.

I placed the footage on the respective video tracks to eliminate using masks on the action footage.  The masks were choking my system, and also difficult to control. 

Is there a way to hide the title/transition when it is over the right 1/3?  I have tried masks and opacity with no luck.

Screen grab and desired result shown below.

Thanks in advance!