If you mean the standard WP post title field. What you need to do is create another field for people to enter the title and then convert that into a title in an acf_pre_save_post filter. There is an example of doing this in this question http://support.advancedcustomfields.com/forums/topic/radio-field-conditional-in-afc_form/ and you can read more about it here http://www.advancedcustomfields.com/resources/acf-pre_save_post/
