intronisation translation French - English : intronisation nf [+pape, roi] enthronement … . French - English, Collins dictionary, synonyms, translation.
dictionary.reverso.net/.../intronisation
Information about enthronement in the free online English dictionary and encyclopedia. ... enthronement [ɪnˈθrəʊnmənt] n [monarch] → intronisation f; ...
www.thefreedictionary.com/enthronement - Προσωρινά αποθηκευμένη - Παρόμοιεςenthrone - definition of enthrone by the Free Online Dictionary ... - [ Μετάφραση αυτής της σελίδας ]
Definition of enthrone in the Online Dictionary. Meaning of enthrone. ... بر تخت نشانی؛ تجلیل kruunaus intronisation הַכתָרָה राज्यारोहण, ...
www.thefreedictionary.com/enthrone

Intronisation is used in English, but only in the context of wine, so if the context is different, maybe introduction is better.

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Note added at 50 mins (2010-04-29 09:42:41 GMT)
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http://www.wineguilduk.org/ceremonial-and-regalia.php

I only know this term in the context of wine where devotees of a certain wine making area in France can be 'intronisé.' They dress up in robes, are admitted as 'confrères,' and everyone has a jolly time. I don't think the litteral translation of 'enthronement' makes much sense so I would suggest something along the lines of the above adapted to the context .

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Note added at 1 hr (2010-04-29 10:10:11 GMT)
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I think that does the job very well. of course initiation can have connotations but I still think it maybe captures the sense better than joining

or even induction ceremony. This is the word used usually for initiating a new member into a society, especially a secret society.

Does it fit your context?