"slow to materialize" is correct and usable in written English.
It typically means that something is taking longer than expected to occur. For example, "The relief funds were slow to materialize after the disaster struck the community."
Money pledged has been slow to materialize.
The opportunity was slow to materialize, though.
And cross-border banking deals have been slow to materialize.
The science has been slow to materialize into square feet.
But "ash to cash" has been slow to materialize.
Already there are signs that competition might be slow to materialize, banking analysts said.
"The demand outlook continues to be strong, with supply lagging elsewhere in the industry, and we are seeing new supplies proving slower to materialize than predicted," said Sam Walsh, the head of Rio Tinto's iron ore division.
There have been some big successes in the food tech industry, like Instacart and Blue Apron, but Ronen said things have been "slower to materialize" in the farm-to-table sector.
You will learn what true suffering is as your body heats to the point where you can no longer convince yourself to run, settling only for a slow shuffle as you wait for a breeze to materialize.
Meanwhile, Barden International, the company the Detroit entrepreneur has set up in a modern industrial park in Namibia's capital, Windhoek, has been slow to work on the conversions, and the promised hundreds of jobs have yet to materialize.
Meanwhile, Barden International, the company the Detroit entrepreneur has set up in a modern industrial park in Namibia's capital, Windhoek, has been slow to work on the conversions, and the hundreds of promised jobs have yet to materialize.
