So in what sense are you denying the divinity of Our Lord, God and Savior Jesus Christ?
The title “Mother of God” (an Englishing of the Greek Theotokos, which if you really want you can English as “Birthgiver of God” instead) is not really about Mary, but about Jesus. It is one of the legacies of the christological controversies which dealt with a lot of wrong-headed ideas about who Jesus is back during the first eight centuries after Our Lord’s earthly ministry.