Unless Scorpio compromises, the relation will create problems. Sagittarius's love of independence and freedom will arouses Scorpio's jealously as he wants to possess, which is denied. Scorpio demands much of both self and others but Sagittarius will rebel against domination.
Some Sagittarius are just too flighty, flippant and fickle for words, making their Scorpio amours break out into cold sweats.They never know what's going to happen next and they hate it.

Sagittarius-Scorpio Compatibility

Although both signs think very deeply about all kinds of causes, they do it in different ways- Sagittarius are philosophical, whereas Scorpios are psychological. Adventurous archers also like to try any thing once-and that can include their Scorpio lovers. The path of true love will run a lot smoother if their Venus nestle in each other's sun signs. They'll both be imbued with a greater understanding of their desires.

Aries (Mar 21-Apr 19) Taurus (April 20 - May 20) Gemini (May 21 - Jun 21)
Cancer(June 22 - July 22) Leo (July 23 - Aug 22) Virgo (Aug 23 - Sept 22)
Libra (Sep 23 - Oct 22) Scorpio (Oct 23 - Nov 21) Sagittarius(Nov 22-Dec 21)
Capricorn (Dec 22 - Jan 19) Aquarius (Jan 20 - Feb 18) Pisces (Feb 19 - Mar 20)

In general the above Generic compatibility analysis hold good for all zodiac signs. If you are looking for in-depth compatibility analysis or if you are a professional astrologer the below analysis of Zodiac signs Compatibility - between different gender of zodiac signs will give you detailed answer. Click the below link to learn more.

Sagittarius Man

Sagittarius Man Compatibility

Sagittarius Man and
Scorpio Woman

Sagittarius Woman

Sagittarius Woman Compatibility

Sagittarius Woman and
Scorpio Man