多谢老猫版主！但是也有网页说property title 是文件的，例如FHA网页

https://www.fha.com/define/property-title#:~:text=A%20property%20title%20is%20a,receives%20payment%20for%20the%20sale.

A property title is a document that shows legal proof of ownership. During the mortgage transaction, the title is handed over to the buyer at the time of closing after all contracts are signed and the seller receives payment for the sale.