NOVELTY - A non-reactive composition comprises thermoplastic polymer and optionally reinforcement fiber or fibrous reinforcement, and polymer which can impregnate with reinforcement fiber (or fibrous reinforcement) and forms thermoplastic matrix of composite material. The thermoplastic polymer is polymeric semicrystalline polyamide having glass transition temperature of 80 degrees C or more, preferably 90 degrees C or more, and melting point of 280 degrees C or less. The semicrystalline polyamide is obtained by polyaddition reaction of polyamide prepolymer (a) and non-polymeric chain extender (b).    USE - Non-reactive composition is used in manufacture of thermoplastic composite material e.g. machine element and structural component e.g. automobile components, railway components, marine, sea, rail, marine, sea, wind, photovoltaic components, solar applications e.g. solar panels and solar plant components, athletic applications, aerospace, road transport on trucks, construction, civil engineering, protective panels and leisure material, electrical and electronic components (all claimed).    ADVANTAGE - The non-reactive composition has excellent fluidity.    DETAILED DESCRIPTION - A non-reactive composition comprises thermoplastic polymer and optionally reinforcement fiber or fibrous reinforcement, and polymer which can impregnate with reinforcement fiber (or fibrous reinforcement) and forms thermoplastic matrix of composite material. The thermoplastic polymer is polymeric semicrystalline polyamide having glass transition temperature of 80 degrees C or more, preferably 90 degrees C or more, and melting point of 280 degrees C or less. The semicrystalline polyamide is obtained by polyaddition reaction of polyamide prepolymer (a) comprising n identical functional groups from carboxyl, amine and hydroxyl groups, preferably carboxyl and amine groups, and non-polymeric chain extender (b) of formula: Y'-A'-Y' (I). The component (b) has molecular weight of less than 500, more preferably less than 400. The thermoplastic polymer and polyamide prepolymer comprise amide units (A), and optionally amide units (B), (C) and (D). The amide unit (A) is of formula: X.T (II), and the content of amide units (A) is 55-95 mol%, preferably 55-85 mol%, more preferably 55-80 mol%. The amide unit (B) is of formula: X'.T (II), which is different amide unit (A), and the content of amide unit (B) is 5-45 mol%, preferably 15-45 mol%, more preferably 20-45 mol%, depending on melting point of the polyamide based on amide unit (A) and amide unit (B). The amide unit (C) is cycloaliphatic and/or aromatic amide unit of formula: X".T (II), which is different amide unit (A) and amide unit (B). The amide unit (D) is different from amide unit (A), amide unit (B) and amide unit (C), when component (C) is preset, the component (D) is aliphatic amide units derived from 6-12C amino acid or lactam and reaction product of 6-18C, preferably 6-12C linear aliphatic diacid and 6-18C, preferably 6-12C linear aliphatic diamine The total amount of component (A), component (B), component (C) and component (D) is 100 mol%.    n=1-3, preferably 2;    A'=single bond which bonds 2 identical reactive functional groups (Y');    Y'=oxazine, oxazoline, oxazolidinone, imidazolyl, epoxy group, isocyanato, maleimido, carboxylic acid cyclic anhydride, aziridine, preferably oxazoline or oxazine;    X=9-18C, preferably 9-12C linear aliphatic diamino;    T=terephthalic acid;    X'=branched aliphatic diamino, preferably 2-methyl pentamethylene diamino, m-xylylenediamino or 4-18C linear aliphatic diamino;and    X"=diamino different from X'.    INDEPENDENT CLAIMS are included for the following:    (1) manufacture of thermoplastic composite material, preferably machine component or structural component; and    (2) use of composition as thermoplastic matrix of composite material for manufacturing mechanical components or structural components.