Titus 2.13 is included in the list of examples of hendiadys in BDF 442.16. Which καί they referring to, and are either of them a true hendiadys?
a) τὴν μακαρίαν ἐλπίδα καὶ ἐπιφάνειαν τῆς δόξης..
Some take the first καί to be epexegetical: awaiting the blessed hope, [that is,] the appearing of.. The hope then is objective, the thing hoped for, which is the appearing of the glory of..
I have seen this described as a hendiadys. But my impression was that in a true hendiadys the pair of terms joined by καί can normally be rendered either with a genitive - the hope of the appearing; or adjectivally - the hoped-for appearing. 'The hope of the appearing' is subjective hope, I think, as if we were waiting until we received the ability to hope. 'The hoped-for appearing' won't work here, I think, because it would have to be the blessed-hoped for appearing or somesuch.
Also, the word hendiadys seems to be used for a balanced pair of short terms, whereas here the epexegetical material carries on.
b) τοῦ μεγάλου θεοῦ καὶ σωτῆρος ἡμῶν Ἰησοῦ Χριστοῦ,
I know it is a matter of much discussion whether Ἰησοῦ Χριστοῦ is τοῦ μεγάλου θεοῦ here. If He is, then possibly this might be called a hendiadys since two terms are joined into one, but this is surely to do with the scope of the article, rather than anything else.
So I don't yet see how either can be a hendiadys in the normal sense. Thanks for your help,
P.S. Blass says [Thackeray, 1905 p.163]:
The article appears to be dropped, not unnaturally, between two clauses in apposition connected by καὶ, in Titus 2.13 (τὴν) ἐπιφάνειαν τῆς δόξης τοῦ μεγάλου θεοῦ καὶ σωτῆρος ἡμῶν [Ἰησοῦ Χριστοῦ],
so if I am understanding correctly what he means by the two clauses in apposition, I think he is indeed reading the καί in an epexegetical way as 'that is,..'.