Title change/301 redirect question

When I change a thread title, url changes too, and it looks like a 301 redirect is created to redirect from an old url to a new url.
My question is what happens when I change such a thread title second time. Will another 301 redirect be created? Doe hit mean that redirect chain will be exist if I change url and then after some time change it again?

And another question - can I somehow see a list of those existed redirects for threads whose titles I changed in the past?

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