Composite readings

Composite Sun and Mars

A composite chart is built from the midpoints between two people's charts, so it is one chart for the pair rather than a chart for either person. These readings say what a placement in it stands for in a pair's shared chart.

Together

Composite Sun conjunct with Mars
The pair's purpose and its drive tend to act as a single force, giving it energy to start things and a direct, spirited way of going after aims.
Composite Sun in an easy aspect with Mars
The pair's effort often backs its goals, so energy tends to go where it wants to head and action can follow intention smoothly.
Composite Sun in a hard aspect with Mars
The pair's purpose and its drive spark against each other, which gives it plenty of energy, with aims and action sometimes setting off in different directions.

None of this is a verdict. A single placement never describes a whole relationship, and astrology is a tradition of interpretation rather than a body of established fact.