Depending on the bank, you can get the title on the spot once the loan is paid in full and sign it over to him. Some banks don't keep the title on the property but in another building or records center; so it may take a few days for them to pull it and get it to you.
Otherwise, you will have to find someone willing to let you send them the title in the mail. With all the shaddy shit lately some people aren't willing to do that and unless I knew the person probably wouldn't do it either.
How are they paying you? Cash, certified check, wire transfer or what?
That could be another factor with the bank if it's not a on the spot payment. If it takes a day or two to clear, that will hold you both up also. Best way is wire the money so you know it's official and you won't get screwed.
Just make sure you type up a bill of sale and everything to clear you and the buyer.