By paying more attention to "concept" of artwork in Postmodern and Contemporary Art, and with the advent of Hermeneutic and Intertextual topics in art, attentions to "title" effects on transferring and turning of concept have increased. Conceptual Art has concerned with these effects more than the other movements. The purpose of this study is identifying of "title" function in visual conceptual art and "title" effectiveness on audience's perception of these works. The article has been conducted on the basis of a Sequential Multi-Method including Semi-Experimental, and Content Analysis methods. The researchers have been experimented "title" effects by semi-experimental method on perception of the sample group members of two visual conceptual artworks. Each one of these two works which made by the researcher have been presented to respondents in "without title" and "titled" situations in which has been requested them to write their perception of the artworks by separate questionnaires including an open-ended question. Then, the information has been processed using content analysis method. The results have been analyzed quantitatively and qualitatively. The authors have based Set Theory in quantitative study part. this article has innovation not only in applying combined methodology in art territory studies, but also in studying "title" effects quantitatively. The results show that "title" in a visual conceptual artwork is considered the part of a work itself and it's not something separate from it. Furthermore, "title" involves in transferring visual conceptual artworks concept and can change their concept between 70% to 80% and turn it between 50% to 64% and concentrate it into some concepts that itself predicate on them, but cannot thin it out into one. "Title" is also able to limit audience's perception of these works between 47% to 61% and expand it between 19% to 32% and create new concepts.