Traditionally the title of Captain is never put to rest but is rather kept as a matter of respect as well as status. Keeping hold of the title is up to the individual, some see it fit to drop the title from the day they lose or give up their stripes for whatever the reason while others opt to hold tight and stand tall for their hard work and dedication to a profession which demands such great responsibility over an extended period of time. These are only my opinions however, and your question will be fully answered on the day it is your turn to hand in your stripes.