I have collided with another ship so can't perform an action. In the same turn I receive two hits so I throw my defense dice and roll a blank and a focus. Can I use one of the stacked focus tokens from other turns on the Hawk to convert the dice focus into an evade

yes

Obligatory link to the other instance of this thread-pair:

https://community.fantasyflightgames.com/topic/226679-hwk290-and-stacked-focus/

(Can we get some kind of double-post filter up in here?)

Obligatory link to the other instance of this thread-pair: https://community.fantasyflightgames.com/topic/226679-hwk290-and-stacked-focus/ (Can we get some kind of double-post filter up in here?)