"two materials" is correct and usable in written English.
For example, you could write: "When building this model, I used two materials: wood and plastic."
The mechanical properties of the two materials are also similar.
"Poets work with two materials, one's black, one's white," Maxwell writes.
When the transfer is complete, the Fermi levels of the two materials are equal.
Fortunately, there are two materials that are both transparent and good hole-generators.
Ms. Takaezu creates her art with either clay or porcelain; the two materials take the glazes very differently.
The "oriental" category of perfumes is basically defined as scents built on two materials, vanilla and labdanum.
The composite is created by mixing the two materials at a ratio of 80% paper and 20% sodium silicate.
Two materials were investigated.
We tested two materials using this design.
Comparisons between these two materials were made.
Finally, they increase the contact area between the two materials.
