hxxp://www.domain.com/category_name/unique_title_here/

If you are aiming for the same keyword or phrase for both of them, just make them slightly different. Some examples:

/keyword-1/
/keyword-2/

/keyword/
/keyword-now/

/my-keyword/
/your-keyword/

Do it however you want. You can even sneak an additional keyword into one the links if you want.

Just you can focus on two long tail keywords for the two articles. You can make use of the combination of the keywords for better ranking those articles. Try to rank 2 to 3 keywords for single webpage/article.