He'll have to go to a DMV office and provide  a completed Application for Duplicate Title PDF MV-902s a proof of identity and $ 20.00 for the replacement fee. Pretty much the same for replacing a title certificate.
Ok, one more question. Regarding my replacement title, I reckon I have some time today to go to a DMV office, I think it'll be faster than doing it by mail. Would I be issued my replacement immediately?
No, you won't be issued the replacement title while you are there. All title certificates are printed in a secure facility in Albany and are mailed to the owners. For this reason I suggest you stick to doing the whole process by mail, since it's faster and you can do it from the comfort of your home.