For the grace of God that bringeth salvation hath appeared to all men, (Titus 2:11)

A simpler and concise translation

is

God’s saving (soterios, σωτήριος ) grace appeared to everyone.

No one need ask when this occurred, but some people seem to be pretending not to understand who exactly is the savior. Well, here are some clues.

God is the Saviour. Titus 1:3
But hath in due times manifested his word through preaching, which is committed unto me according to the commandment of God our Saviour;
Yeshua the Anointed is the Saviour. Titus 1:4
To Titus, mine own son after the common faith: Grace, mercy, and peace, from God the Father and the Lord Jesus Christ our Saviour.
Yeshua the Anointed is the Saviour. Titus 3:6
Which he shed on us abundantly through Jesus Christ our Saviour;

The two pillars of the Christ Event are on display here: bringing salvation and teaching us; Lamb and Paraclete.
Both are grace’s work. The salvation is entirely God’s work, and no partners were needed. The teaching is thought to include human contributions. However, if one follows the thread back to grace, one finds that neither human will power nor human contributions can produce

• A denial of godlessness and worldly desires
• A sensible, righteous, and godly lifestyle

On two pillars

Human theories and many so-called discoveries may load us up with hundreds of regulations and bits of information we supposedly”need to know”. Not so from or in Christ. From Christ we have two pillars: one, we died with him, two, we live in the Holy Spirit.

We died with Christ. We live/walk in the Holy Spirit