The phrase "actually composed of a" is correct and usable in written English.
It can be used when explaining the components or elements that make up something, often in a detailed or clarifying context.
Example: "The sculpture is actually composed of a variety of materials, including bronze, glass, and wood."
Alternatives: "made up of a" or "consists of a".
Actually composed of a series of huge canyons, Copper is traditionally home to the native Tarahumara Indians, a reclusive people who still live in remote canyon villages much as they have for centuries.
The size of the lake is difficult to define, as the lake is actually composed of a system of lakes and marshes that are subject to considerable seasonal variation.
The team behind Cronologics was actually composed of a number of ex-Googlers, too, so it's a bit of a homecoming for the talent.
This is an issue that greatly impacts Tumblr, given that its blogging network is actually composed of a lot of porn.
The microstructure is actually composed of a random growth of seemingly flexible nanolaminas that can be bent and connected with each other.
Each state is actually composed of a coordination pattern; a set of state-specific constraints, which enable finer decisions (details further in Section 4.3); and a set of necessary assets for the analysis e.g., PRISM specifications and symbolic port automata.
In other words, the thickest cells in this sublibrary could have been related to the next sublibrary, where more cells showed improved IQE, while the remaining cells in this peripheral sublibrary are actually composed of an inefficient absorber, that the less deposition of it, the more pronounced the efficiency of the underlying TiO2.
The "house" is actually composed of four buildings on a 100-by-250-foot lot.
It has also been proposed that an isogenic population of C. elegans is actually composed of subpopulations that each have a different mortality pattern ("discrete heterogeneity" model).
While Ockham does not assert that a line is actually "composed" of points, he had the insight, startling in its prescience, that a punctate and yet continuous line becomes a possibility when conceived as a dense array of points, rather than as an assemblage of points in contiguous succession.
Kepler-14 is a binary star system, which means that it is actually composed of two gravitationally bound stars that orbit a common point in space.
