  Feller, Klug, Schirmer and Zemke showed the homology and the intersection
form of a closed trisected 4-manifold are described in terms of trisection
diagram. In this paper, it is confirmed that we are able to calculate those of
a trisected 4-manifold with boundary in a similar way. Moreover, we describe a
representative of the second Stiefel-Whitney class by the relative trisection
diagram.
