Correct gluing of domains and redirect pages?

Question

Search Engine Optimization

Good day!
I'm going to glue two domains, they are similar, but different.
The reasons for gluing are affiliates.
Question - Is it necessary that both sites have the same title and page description?
The content will be the same.
Thanks in advance for your reply!

Answer 1

Do you mean full gluing?
That is, that the first domain would be a non-primary mirror. And the second - the main?
In fact, there should be one site.
From the first site there should be a page 301 redirect to the second site.