Moving half my website to a new website: 301?

[HashtagHustler]

Good Morning!

We currently have two websites which are driving all of our traffic. Our end goal is to combine the two and fold them into each other. Can I redirect the duplicate content from one domain to our main domain even though the URL's are different. Ill give an example below. (The domains are not the real domains). The CEO does not want to remove the other website entirely yet, but is willing to begin some sort of consolidation process.

ABCaddiction.com is the main domain which covers everything from drug addiction to dual diagnosis treatment.

ABCdualdiagnosis.com is our secondary website which covers everything as well. Can I redirect the entire drug addiction half of the website to ABCaddiction.com? With the eventual goal of moving everything together.

[Martijn_Scheijbeler]

I would say Yes, if you make sure you're redirecting the right pages to the working URLS on the other site you should be fine. Also make sure that sitemaps are updated as Google won't like redirects within a sitemap.