The present invention relates to a titanium dioxide composition which comprises: 1 to 15 parts by weight of titanium dioxide particles containing copper (Cu)-magnesium (Mg) with respect to 100 parts by weight of water and, more specifically, to a titanium dioxide composition which is easy to remove titanium dioxide and can extend plant life.COPYRIGHT KIPO 2020본 발명의 이산화티탄 조성물은 물 100 중량부에 대하여, 구리(Cu)-마그네슘(Mg) 함유 이산화티탄 입자 1 내지 15 중량부를 포함한다.