This combination is powerful and their connection is perfect but he should never try to persuade her to do anything she does not wants to do.
She is even able to dominate the relationship if she can match his intelligence and ability to converse with her Sagittarius man on a philosophical level that matches his.
Her frustrations are very real, although unknown to most including her, but in the company of someone who she can share her ups and downs with appeases her frustration and definitely Sagittarius male is the right man to pacify her.
The primal desire between a man and a woman is more often than not subconscious.
Even though he feels the need to roam and satiate his hunger for freedom, she tends to somehow soothe this need into a calm that he feels so comfortable in.
Libra and Sagittarius share a very smooth and comfortable relationship.