has not yet been manifested vs has not yet materialized

Some examples from the web:

• has not yet been manifested
• This point has not yet been satisfactorily resolved.
• The prince has not yet been dismissed.
• I feel, despite everything, full recognition has not yet been given him.
• The identity of the strangler has not yet been determined.
• The sentence on this charge has not yet been determined.
• Rail transport is one of the few sectors in which the single market has not yet been completed.
• The reiterated request of a European year against violence has not yet been answered.
• The communication under consideration suggests that this message has not yet been taken on board.
• The aim of a Europe-wide network has not yet been fully achieved.
• The aim of a Europe-wide network has not yet been fully achieved.
• The process of liberalisation has not yet been completed in some important areas.
• This examination has not yet been carried out.
• The interim EPA has not yet been concluded.
• The agreement on customs has not yet been negotiated.
• The assessment of substances listed in annex III has not yet been completed.
• A decision has not yet been taken to this respect.
• Draft regulation for a new financial instrument has not yet been approved by the Council.
• The clause has also a reciprocal dimension which has not yet been fully exploited.
• And it is believed, though this has not yet been...
• This means that the matter has not yet been settled.

Some examples from the web:

• The program for the distribution of fertilizers has not yet materialized.
• But the idea of making a big deal, in a stadium, had not yet materialized.
• Sci-fi technologies they've been promising us for years but have not yet materialized.
• For herbaceous biomass pellets, such long supply chains have not yet materialized, due to the lack of large markets for these fuels.
• The Prime Minister of Mozambique presided over the event. (...) The decision to expand SEAMIC's membership will be of great interest to West and North African countries as plans to set up minerals centres in these sub regions have not yet materialized.
• In that moment, I did not understand very well what Joe had in mind. The idea of setting it all within an old theater had not yet materialized.
• It's almost as though the photograph hasn't yet materialized, as though the artist, in spite of displaying an image, a representation, were showing something that came before any image and any possible representation.
• Money is monetized debt... whether it materialized from treasury bonds... home loan contracts or credit cards.
• And coin would have materialized the same.
• And the chain you materialized is made of gold.
• Amazing how the idea materialized from just a table and four chairs.
• Witnesses report the funnel materialized spontaneously, directly over Amanda's home, destroyed it and disappeared.
• It hoped for changes, but these have not materialized.
• I also think I know where they materialized.
• Finally several running lights - some red, a few green - materialized out of the night.
• In the last quarter of 2012, the long-expected rebound in growth finally materialized.
• Frédérico Alagna: Yes... and everything today has materialized.
• Souls of the dead with disfigured faces had somehow materialized in this world.
• The Observatory will be "materialized" by the opening of a dedicated website early next year.
• The following evening, the jinn materialized out of my humidifier.