Let us look at this verse which speaks of the appearing of the Lord Jesus, our great God and Savior:
"...while we wait for the blessed hope--the appearing of the glory of our great God and Savior, Jesus Christ" (Titus 2:13).
The following passage speaks of us looking for that appearance and the "glory" which we will see will be the Lord Jesus' "glorious body":
"But our citizenship is in heaven. And we eagerly await a Savior from there, the Lord Jesus Christ, who, by the power that enables him to bring everything under his control, will transform our lowly bodies so that they will be like his glorious body" (Phil.3:20-21).
The following verse is also speaking of the same "appearance" and the same "glory":
"When Christ, who is our life, shall appear, then shall ye also appear with him in glory" (Col.3:4).
The following passage desribes this same appearance as a "hope":
"Beloved, now are we the children of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is. And every man that hath this hope in him purifieth himself, even as he is pure
" (1 Jn.3:2).
So the 'hope" and the "glory" in the following verse is referring to the glorious body in which we will see the Lord Jesus when He will appear:
"...while we wait for the blessed hope--the appearing of the glory of our great God and Savior, Jesus Christ" (Titus 2:13).
That is why Paul refers to that glory as belonging to the Lord Jesus, our great God and Savior.
since the Lord Jesus is God then it is obvious that He was not created. He is the Alpha and Omega, the Beginning and the End.