Change post title to a different URL?

Hello.

Is it possible to change the post title of some posts to become URLs to a different webpage? If I write the post title WordPress, and then when you click on the title it takes you to www.ads-software.com.

The reason for me asking this is because I have a category that are suppose to show news articles about my company, and sometimes I want to write about it, and other time I just want to link directly to the news URL.

Anyone with an idea? It should be possible if I write some kind of code in the functions.php and then just ad a custom field when I want to change the post title to a different link. But I do not know what kind of code this should be.

Thanks for any suggestions and help ??