Binary mixtures between a chiral twin possessing two identical chiral moieties and the analogous parent monomeric liquid crystal were prepared, and liquid-crystalline properties investigated. TGB phase was found to be induced in some mixtures between (R, R)-twin and (R)-monomer. A mixture between (S, S)-twin and (R)-monomer showed an induced nematic phase due to the pitch compensation, however, also showed an induced TGB phase. XRD measurements showed that the intra-layer molecular distance increases by mixing the twin and monomeric compounds, which may produce a weaker layered structure, consequently, the TGB structure was stabilized.