Can I Confirm the Title of a Novel and Then Change It Later?

I really like a passage written by Andrei Spavorsky: Choose an interesting time period, especially a period of great turmoil: war, religious conflict, political oppression, revolution, etc., Throw your protagonist into this witch's crucible, let him find a way out, let him make a choice, let him suffer for wrong choices, let him be baptized, let him mature, let him find or lose his true love, conscience, ideals and humanity. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.