多謝老貓版主！但是也有網頁說property title 是文件的，例如FHA網頁

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.