"amalgamating to" is a correct and usable phrase in written English.
You can use it when you are joining or combining two or more things together. For example, "The two companies are amalgamating to form a new business entity."
The revised proposals are likely to force further consolidation in the legal market, with many small firms amalgamating to save on overheads.
The small sulphide mineral cores formed along the Alvinella spp. organic tube layer and sublayer surfaces continue to grow in a directed manner, amalgamating to produce bands of iron sulphides (pyrite).
IR-spectra of orthoenstatite exhibit many absorption bands between 3000 and 3700 cm−1 (Fig. 1), some of them amalgamating to broad absorption features similar to those known from natural specimens (e.g. Bell et al. 1995; Prechtel and Stalder 2012).
Mahogany Opera and the Opera Group have amalgamated to form the Mahogany Opera Group.
In 1973 the four Muslim parties were amalgamated to form the United Development Party (Partai Persatuan Pembangunan; PPP), and the five non-Muslim parties were amalgamated to form the Indonesian Democratic Party (Partai Demokrasi Indonesia; PDI).
The two original classes were increased to four, and some specialized branches were amalgamated to become the Scientific Civil Service.
Through the Ordinance of 1787 the ceded lands were amalgamated to create the Northwest Territory, which included present-day Indiana.
An increasingly multiskill economy, where jobs are amalgamated to cut costs and where one job requires strengths across several unrelated areas, does not favour those with SpLDs.
In 1955 the town of Powell River and several surrounding communities amalgamated to form a district municipality of 16 square miles (41 square km).
In 1963 the five cities of Moji, Kokura, Tobata, Yahata, and Wakamatsu were amalgamated to form Kita-Kyūshū, the largest city and industrial complex in Kyushu.
At the same time, more than 100 existing local councils were amalgamated to form a modernized system of 33 boroughs, including the City of London and its considerably younger neighbour, the City of Westminster, chartered in 1900.
