This title might be a reference to God and Jesus (Yeshua‘) as separate members of the Trinity. However, it is more likely to be a title for Jesus, emphasizing His oneness with God as a member of the Trinity (Father, Son, and Holy Spirit).
Our God and Savior Jesus Christ in Greek:
Theou hēmōn kai sōtēros Iēsou Christou
Strong’s Concordance numbers: 2316, 2257, 4990, 2424, 5547
Bible reference: 2 Pet. 1:1
Simon Peter, a servant and apostle of Jesus Christ, to those who through the righteousness of our God and Savior Jesus Christ have received a faith as precious as ours. (2 Peter 1:1 NIV)
In the KJV the phrase is understood as a reference to two persons of the Trinity:
“God and our Saviour Jesus Christ.”
Our great God and Savior Jesus Christ in Greek:
Ho megalos Theos kai sōtēr hēmōn Iēsous Christos
Strong’s Concordance numbers: 3173, 2316, 4990, 2257, 2424, 5547
Bible reference: Tit. 2:13
We wait for the blessed hope—the appearing of the glory of our great God and Savior, Jesus Christ. (Titus 2:13 NIV)